Add ADC code to measure temperature. Supervisor not yet implemented
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@ -12,6 +12,7 @@ endif
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#Add Files and Folders below#########################################################
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CFILES = main.c syscalls/syscalls.c setup/system_init.c startup/startup_stm32f0xx.c
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CFILES += temp-adc.c
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ASFILES = sk6812.S
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INCLUDEPATH = -Iinclude -Iinclude/cmsis
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@ -39,7 +40,7 @@ LFLAGS += -mfloat-abi=soft --disable-newlib-supplied-syscalls -nostartfiles
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LFLAGS += -Tstartup/stm32f030.ld -Wl,-Map=$(mapfile).map -Wl,--gc-sections -g
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CFLAGS = -c -fmessage-length=0 -mlittle-endian -mthumb -mcpu=cortex-m0 -mthumb-interwork
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CFLAGS += -mfloat-abi=soft -nostartfiles -Wall -g -O3
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CFLAGS += -mfloat-abi=soft -nostartfiles -Wall -g3 -O0
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####################################################################################
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@ -145,8 +145,8 @@
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#endif
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#include <stdint.h> /* standard types definitions */
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#include <core_cmInstr.h> /* Core Instruction Access */
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#include <core_cmFunc.h> /* Core Function Access */
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#include <cmsis/core_cmInstr.h> /* Core Instruction Access */
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#include <cmsis/core_cmFunc.h> /* Core Function Access */
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#ifdef __cplusplus
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}
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10
firmware/include/ring-light/temp-adc.h
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10
firmware/include/ring-light/temp-adc.h
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@ -0,0 +1,10 @@
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#ifndef _TEMP_ADC_H_
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#define _TEMP_ADC_H_
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#include <stdint.h>
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void temperature_adc_init(void);
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int32_t temperature_adc_get_temp(void);
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#endif /* _TEMP_ADC_H_ */
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@ -9,7 +9,7 @@
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* This file contains:
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* - Data structures and the address mapping for all peripherals
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* - Peripheral's registers declarations and bits definition
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* - Macros to access peripheral’s registers hardware
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* - Macros to access peripheral<EFBFBD>s registers hardware
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*
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******************************************************************************
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* @attention
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@ -114,8 +114,8 @@ typedef enum
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* @}
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*/
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#include "core_cm0.h" /* Cortex-M0 processor and core peripherals */
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#include "system_stm32f0xx.h" /* STM32F0xx System Header */
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#include <cmsis/core_cm0.h> /* Cortex-M0 processor and core peripherals */
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#include <system_stm32f0xx.h> /* STM32F0xx System Header */
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#include <stdint.h>
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/** @addtogroup Peripheral_registers_structures
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@ -1,6 +1,7 @@
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#include <stm32f0xx.h>
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#include <cmsis/core_cm0.h>
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#include <stdbool.h>
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#include <ring-light/temp-adc.h>
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#define RING_MAX_LED 30u
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@ -16,8 +17,7 @@ enum ring_modes {
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RING_MODE_MAX
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};
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unsigned int i = 0x12345678;
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unsigned char c = 2;
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volatile int32_t temperature;
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extern void sk6812_send_led(uint32_t rgbw);
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@ -33,6 +33,7 @@ int main(void)
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{
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uint32_t led_val = 0x00UL;
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uint32_t led_calc_val[RING_MAX_LED] = {0x00UL};
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bool button_pressed = false;
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enum ring_modes mode = RING_MODE_ALL;
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@ -55,9 +56,11 @@ int main(void)
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TIM3->PSC = 0;
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TIM3->CR1 = TIM_CR1_CEN;
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temperature_adc_init();
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SysTick_Config(800000);
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while(1) {
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temperature = temperature_adc_get_temp();
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switch (mode)
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{
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case RING_MODE_ALL:
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102
firmware/temp-adc.c
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102
firmware/temp-adc.c
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@ -0,0 +1,102 @@
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#include <ring-light/temp-adc.h>
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#include <stm32f0xx.h>
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#define FLOAT_TO_S23_8(x) (int32_t)((x) * 1024.0f)
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static volatile uint16_t adc_results[16];
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static volatile int32_t vdd_lf_s23_8 = FLOAT_TO_S23_8(0);
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static volatile int32_t temp_lf_s23_8 = FLOAT_TO_S23_8(0);
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void temperature_adc_init(void)
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{
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RCC->AHBENR |= RCC_AHBENR_DMAEN;
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RCC->APB2ENR |= RCC_APB2ENR_ADCEN;
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/* ADC is mapped to DMA Channel 1 */
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SYSCFG->CFGR1 &= ~SYSCFG_CFGR1_DMA_RMP;
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DMA1_Channel1->CNDTR = 16;
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DMA1_Channel1->CPAR = (uint32_t)&ADC1->DR;
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DMA1_Channel1->CMAR = (uint32_t)&adc_results[0];
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DMA1_Channel1->CCR = DMA_CCR_PL_1 | DMA_CCR_MSIZE_0 | DMA_CCR_PSIZE_0 | DMA_CCR_MINC | DMA_CCR_CIRC | DMA_CCR_TCIE | DMA_CCR_EN;
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NVIC_EnableIRQ(DMA1_Channel1_IRQn);
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/* Calibrate the ADC */
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ADC1->CR = ADC_CR_ADCAL;
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while (ADC1->CR & ADC_CR_ADCAL);
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/* Dummy read the offset calibration value */
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ADC1->DR;
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ADC1->CR = 0;
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ADC1->CFGR1 = ADC_CFGR1_DMAEN | ADC_CFGR1_DMACFG | ADC_CFGR1_CONT;
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ADC1->CFGR2 = ADC_CFGR2_CKMODE_1;
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ADC1->SMPR = 7u;
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ADC->CCR |= ADC_CCR_TSEN | ADC_CCR_VREFEN;
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ADC1->CHSELR = (1<<17) | (1<<16);
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ADC1->CR = ADC_CR_ADEN | ADC_CR_ADSTART;
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}
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static uint32_t get_temp_sensor_cal(void)
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{
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const volatile uint16_t *cal;
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cal = (const volatile uint16_t *)0x1FFFF7B8UL;
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return (uint32_t)*cal;
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}
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int32_t temperature_adc_get_temp(void)
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{
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int32_t temp;
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const int32_t slope = FLOAT_TO_S23_8(5.336f);
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temp = ((temp_lf_s23_8 / 16) * vdd_lf_s23_8 / FLOAT_TO_S23_8(3.3)) * 16;
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temp = (get_temp_sensor_cal() << 10) - temp;
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temp = (temp * 10 / slope) + 300;
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}
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static uint32_t get_vrefint_cal(void)
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{
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const volatile uint16_t *cal;
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cal = (const volatile uint16_t *)0x1FFFF7BAUL;
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return (uint32_t)*cal;
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}
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static void process_adc_samples(void)
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{
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int i;
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uint32_t temp_val = 0;
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uint32_t vref_val = 0;
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int32_t vdd_s23_8;
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int32_t temp_s23_8;
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const uint32_t ref_cal = get_vrefint_cal();
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for (i = 0; i < 8; i++) {
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temp_val += adc_results[2 * i];
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vref_val += adc_results[(2 * i) + 1];
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}
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vref_val >>= 3;
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temp_val >>= 3;
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vdd_s23_8 = (FLOAT_TO_S23_8(3.3f) * ref_cal) / vref_val;
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temp_s23_8 = temp_val << 10;
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/* Moving average filter */
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vdd_lf_s23_8 = (vdd_lf_s23_8 * FLOAT_TO_S23_8(0.78125f) + vdd_s23_8 * FLOAT_TO_S23_8(0.21875f)) >> 10;
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temp_lf_s23_8 = (int32_t)((((int64_t)temp_lf_s23_8 * (int64_t)FLOAT_TO_S23_8(0.78125f)) + temp_s23_8 * FLOAT_TO_S23_8(0.21875f)) / 1024);
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}
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void DMA_CH1_IRQHandler(void)
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{
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uint32_t isr;
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isr = DMA1->ISR;
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DMA1->IFCR = isr;
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if (isr & DMA_ISR_TCIF1) {
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process_adc_samples();
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}
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}
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