Make claibration routine non blocking
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b9857745b1
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2614cea431
@ -27,7 +27,7 @@
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#include <stdlib.h>
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#include <float.h>
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extern struct stm_uart shell_uart;
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enum calibration_shell_state {CAL_START = 0, CAL_WAIT_RES1, CAL_MEAS_RES1, CAL_WAIT_RES2, CAL_MEAS_RES2};
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void calibration_calculate(float low_measured, float low_setpoint, float high_measured, float high_setpoint,
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float *sens_deviation, float *sens_corrected_offset)
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@ -50,124 +50,217 @@ void calibration_calculate(float low_measured, float low_setpoint, float high_me
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int calibration_acquire_data(float *mu, float *max_dev, uint32_t count)
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float *calibration_acquire_data_start(uint32_t count, volatile int *flag)
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{
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int status;
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float *stream_mem;
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float min_val = FLT_MAX;
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float max_val = -FLT_MAX;
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uint32_t i;
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int ret_val = 0;
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static volatile int flag = 0;
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if (!mu || !max_dev || !count)
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return -1000;
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if (!count)
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return NULL;
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stream_mem = (float *)calloc(count, sizeof(float));
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if (!stream_mem)
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return -2;
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return stream_mem;
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status = adc_pt1000_stream_raw_value_to_memory(stream_mem, count, &flag);
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*flag = 0;
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status = adc_pt1000_stream_raw_value_to_memory(stream_mem, count, flag);
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if (status)
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return status;
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goto free_mem;
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/* Wait for data to be transferred */
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while (flag == 0);
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if (flag != 1) {
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return stream_mem;
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free_mem:
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free(stream_mem);
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return NULL;
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}
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static int calibration_poll_data_acquisition(float *mem_array, uint32_t count, volatile int *flag, float *mu, float *max_dev)
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{
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int ret_val = 0;
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float min_val = FLT_MAX;
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float max_val = -FLT_MAX;
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uint32_t i;
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if (!flag || !mem_array || !mu || !max_dev)
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return -1000;
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if (*flag == 0) {
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/* Continue polling */
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return 1;
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}
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if (*flag != 1) {
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/* Error */
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ret_val = -1;
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goto ret_free_mem;
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}
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/* Convert the stream memory to Ohm readings */
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adc_pt1000_convert_raw_value_array_to_resistance(NULL, stream_mem, count);
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adc_pt1000_convert_raw_value_array_to_resistance(NULL, mem_array, count);
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/* Do not compute std-deviation. Too imprecise
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* arm_std_f32(stream_mem, count, sigma);
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*/
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arm_mean_f32(stream_mem, count, mu);
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arm_mean_f32(mem_array, count, mu);
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/* Find min and max values of array */
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for (i = 0U; i < count; i++) {
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min_val = MIN(min_val, stream_mem[i]);
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max_val = MAX(max_val, stream_mem[i]);
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min_val = MIN(min_val, mem_array[i]);
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max_val = MAX(max_val, mem_array[i]);
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}
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/* Compute maximum deviation range */
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*max_dev = max_val - min_val;
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ret_free_mem:
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free(stream_mem);
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free(mem_array);
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return ret_val;
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}
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static void wait_for_uart_enter()
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shellmatta_retCode_t calibration_sequence_shell_cmd(shellmatta_handle_t shell, const char *arg, uint32_t len)
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{
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int enter_received = 0;
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const char *recv_data;
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size_t recv_len;
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size_t iter;
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int uart_recv_status;
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(void)arg;
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(void)len;
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do {
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uart_recv_status = uart_receive_data_with_dma(&shell_uart, &recv_data, &recv_len);
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if (uart_recv_status >= 1) {
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for (iter = 0; iter < recv_len; iter++) {
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if (recv_data[iter] == '\n' || recv_data[iter] == '\r')
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enter_received = 1;
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/* This stores the current state of the calibration process */
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static enum calibration_shell_state cal_state = CAL_START;
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shellmatta_retCode_t ret_val = SHELLMATTA_BUSY;
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uint32_t i;
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int res;
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static float mu = 0.0f, mu2 = 0.0f, dev = 0.0f, dev2 = 0.0f;
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float sens_dev, offset;
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static float *data_buffer = NULL;
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static volatile int flag;
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char *stdin_data;
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uint32_t stdin_len;
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switch (cal_state) {
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case CAL_START:
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/* Clear errors of PT1000 reading */
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adc_pt1000_clear_error();
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shellmatta_printf(shell, "Starting calibration: Insert 1000 Ohm calibration resistor and press ENTER\r\n");
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cal_state = CAL_WAIT_RES1;
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ret_val = SHELLMATTA_CONTINUE;
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break;
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case CAL_WAIT_RES1:
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cal_state = CAL_WAIT_RES1;
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ret_val = SHELLMATTA_CONTINUE;
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shellmatta_read(shell, &stdin_data, &stdin_len);
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if (stdin_len > 0) {
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for (i = 0; i < stdin_len; i++) {
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if (stdin_data[i] == '\r') {
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cal_state = CAL_MEAS_RES1;
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ret_val = SHELLMATTA_BUSY;
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shellmatta_printf(shell, "Measurement...\r\n");
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adc_pt1000_clear_error();
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data_buffer = calibration_acquire_data_start(512UL, &flag);
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break;
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} else if (stdin_data[i] == '\x03') {
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cal_state = CAL_START;
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}
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}
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}
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} while (enter_received == 0);
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}
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int calibration_sequence_shell_cmd(shellmatta_handle_t shell)
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{
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float mu, mu2, dev, dev2;
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float sens_dev, offset;
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/* Clear errors of PT1000 reading */
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adc_pt1000_clear_error();
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shellmatta_printf(shell, "Starting calibration: Insert 1000 Ohm calibration resistor and press ENTER\r\n");
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wait_for_uart_enter();
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shellmatta_printf(shell, "Measurement...\r\n");
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/* Clear errors of PT1000 reading */
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adc_pt1000_clear_error();
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calibration_acquire_data(&mu, &dev, 512UL);
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shellmatta_printf(shell, "R=%.2f, Noise peak-peak: %.2f\r\n", mu, dev);
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if (adc_pt1000_check_error() != ADC_PT1000_NO_ERR) {
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shellmatta_printf(shell, "Error in resistance measurement: %d", adc_pt1000_check_error());
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return -1;
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}
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/* Measure 2nd calibration point */
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shellmatta_printf(shell, "Insert 2000 Ohm calibration resistor and press ENTER\r\n");
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wait_for_uart_enter();
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shellmatta_printf(shell, "Measurement...\r\n");
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/* Clear errors of PT1000 reading */
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adc_pt1000_clear_error();
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calibration_acquire_data(&mu2, &dev2, 512UL);
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shellmatta_printf(shell, "R=%.2f, Noise peak-peak: %.2f\r\n", mu2, dev2);
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if (adc_pt1000_check_error() != ADC_PT1000_NO_ERR) {
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shellmatta_printf(shell, "Error in resistance measurement: %d", adc_pt1000_check_error());
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return -2;
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}
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/* Check noise values */
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if (dev > CALIBRATION_MAX_PEAK_PEAK_NOISE_OHM || dev2 > CALIBRATION_MAX_PEAK_PEAK_NOISE_OHM) {
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shellmatta_printf(shell, "Calibration failed! Too much noise. Check your hardware.\r\n");
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return -3;
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}
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/* Calculate calibration */
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calibration_calculate(mu, 1000.0f, mu2, 2000.0f, &sens_dev, &offset);
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shellmatta_printf(shell, "Calibration done:\r\n\tSENS_DEVIATION: %.4f\r\n\tOFFSET_CORR: %.2f\r\n", sens_dev, offset);
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adc_pt1000_set_resistance_calibration(offset, sens_dev, true);
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return 0;
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break;
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case CAL_MEAS_RES1:
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if (!data_buffer) {
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shellmatta_printf(shell, "Data acquisition failed!\r\n");
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ret_val = SHELLMATTA_OK;
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cal_state = CAL_START;
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break;
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}
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res = calibration_poll_data_acquisition(data_buffer, 512UL, &flag, &mu, &dev);
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/* Stay in this state until the measurements are finished */
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if (res == 1) {
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ret_val = SHELLMATTA_BUSY;
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cal_state = CAL_MEAS_RES1;
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} else if (res == 0) {
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shellmatta_printf(shell, "R=%.2f, Noise peak-peak: %.2f\r\n", mu, dev);
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if (adc_pt1000_check_error() != ADC_PT1000_NO_ERR) {
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shellmatta_printf(shell, "Error in resistance measurement: %d", adc_pt1000_check_error());
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ret_val = SHELLMATTA_OK;
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cal_state = CAL_START;
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} else {
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ret_val = SHELLMATTA_CONTINUE;
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shellmatta_printf(shell, "Insert 2000 Ohm calibration resistor and press ENTER\r\n");
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cal_state = CAL_WAIT_RES2;
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}
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} else {
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shellmatta_printf(shell, "Error in resistance measurement: %d", adc_pt1000_check_error());
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ret_val = SHELLMATTA_OK;
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cal_state = CAL_START;
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}
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break;
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case CAL_WAIT_RES2:
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cal_state = CAL_WAIT_RES2;
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ret_val = SHELLMATTA_CONTINUE;
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shellmatta_read(shell, &stdin_data, &stdin_len);
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if (stdin_len > 0) {
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for (i = 0; i < stdin_len; i++) {
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if (stdin_data[i] == '\r') {
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cal_state = CAL_MEAS_RES2;
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ret_val = SHELLMATTA_BUSY;
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shellmatta_printf(shell, "Measurement...\r\n");
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adc_pt1000_clear_error();
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data_buffer = calibration_acquire_data_start(512UL, &flag);
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break;
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} else if (stdin_data[i] == '\x03') {
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cal_state = CAL_START;
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}
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}
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}
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break;
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case CAL_MEAS_RES2:
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if (!data_buffer) {
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shellmatta_printf(shell, "Data acquisition failed!\r\n");
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ret_val = SHELLMATTA_OK;
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cal_state = CAL_START;
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break;
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}
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res = calibration_poll_data_acquisition(data_buffer, 512UL, &flag, &mu2, &dev2);
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/* Stay in this state until the measurements are finished */
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if (res == 1) {
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ret_val = SHELLMATTA_BUSY;
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cal_state = CAL_MEAS_RES2;
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} else if (res == 0) {
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shellmatta_printf(shell, "R=%.2f, Noise peak-peak: %.2f\r\n", mu2, dev2);
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if (adc_pt1000_check_error() != ADC_PT1000_NO_ERR) {
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shellmatta_printf(shell, "Error in resistance measurement: %d", adc_pt1000_check_error());
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ret_val = SHELLMATTA_OK;
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cal_state = CAL_START;
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} else {
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ret_val = SHELLMATTA_OK;
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cal_state = CAL_START;
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if (dev > CALIBRATION_MAX_PEAK_PEAK_NOISE_OHM ||
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dev2 > CALIBRATION_MAX_PEAK_PEAK_NOISE_OHM) {
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shellmatta_printf(shell, "Calibration failed! Too much noise. Check your hardware.\r\n");
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break;
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}
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shellmatta_printf(shell, "Calibartion finished successfully!\r\n");
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/* Calculate calibration */
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calibration_calculate(mu, 1000.0f, mu2, 2000.0f, &sens_dev, &offset);
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shellmatta_printf(shell, "\r\n\tSENS_DEVIATION: %.4f\r\n\tOFFSET_CORR: %.2f\r\n", sens_dev, offset);
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adc_pt1000_set_resistance_calibration(offset, sens_dev, true);
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}
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} else {
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shellmatta_printf(shell, "Error in resistance measurement: %d", adc_pt1000_check_error());
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ret_val = SHELLMATTA_OK;
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cal_state = CAL_START;
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}
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break;
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default:
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shellmatta_printf(shell, "Undefined state reached in calibration. Aborting\r\n");
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cal_state = CAL_START;
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ret_val = SHELLMATTA_OK;
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break;
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}
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return ret_val;
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}
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@ -29,8 +29,8 @@
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void calibration_calculate(float low_measured, float low_setpoint, float high_measured, float high_setpoint,
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float *sens_deviation, float *sens_corrected_offset);
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int calibration_acquire_data(float *mu, float *max_dev, uint32_t count);
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float *calibration_acquire_data_start(uint32_t count, volatile int *flag);
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int calibration_sequence_shell_cmd(shellmatta_handle_t shell);
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shellmatta_retCode_t calibration_sequence_shell_cmd(shellmatta_handle_t shell, const char *arg, uint32_t len);
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#endif /* __CALIBRATION_H__ */
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@ -200,8 +200,7 @@ static shellmatta_retCode_t shell_cmd_cal(const shellmatta_handle_t handle,
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(void)arguments;
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(void)length;
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calibration_sequence_shell_cmd(handle);
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return SHELLMATTA_OK;
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return calibration_sequence_shell_cmd(handle, arguments, length);
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}
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static shellmatta_retCode_t shell_meminfo(const shellmatta_handle_t handle,
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