49 lines
1.4 KiB
C
49 lines
1.4 KiB
C
#include <reflow-controller/hw-version-detect.h>
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#include <stm-periph/clock-enable-manager.h>
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#include <stm32/stm32f4xx.h>
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#define HW_REV_DETECT_GPIO GPIOE
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#define HW_REV_DETECT_RCC_FIELD RCC_AHB1ENR_GPIOEEN
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#define HW_REV_DETECT_PIN_LOW (8U)
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#define HW_REV_DETECT_PIN_HIGH (15U)
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enum hw_revision get_pcb_hardware_version(void)
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{
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uint8_t current_pin;
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uint16_t port_bitmask = 0U;
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static enum hw_revision revision = HW_REV_NOT_DETECTED;
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if (revision != HW_REV_NOT_DETECTED)
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return revision;
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rcc_manager_enable_clock(&RCC->AHB1ENR, BITMASK_TO_BITNO(HW_REV_DETECT_RCC_FIELD));
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/* Setup the pins as input with pull up */
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for (current_pin = HW_REV_DETECT_PIN_LOW; current_pin <= HW_REV_DETECT_PIN_HIGH; current_pin++) {
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HW_REV_DETECT_GPIO->MODER &= MODER_DELETE(current_pin);
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HW_REV_DETECT_GPIO->PUPDR &= PUPDR_DELETE(current_pin);
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HW_REV_DETECT_GPIO->PUPDR |= PULLUP(current_pin);
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}
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/* Loop again and read in the pin mask */
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for (current_pin = HW_REV_DETECT_PIN_LOW; current_pin <= HW_REV_DETECT_PIN_HIGH; current_pin++) {
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port_bitmask <<= 1;
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port_bitmask |= (HW_REV_DETECT_GPIO->IDR & (1 << current_pin)) ? 0x0 : 0x1;
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}
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switch (port_bitmask) {
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case 0U:
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revision = HW_REV_V1_2;
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break;
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case 1U:
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revision = HW_REV_V1_3;
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break;
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default:
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revision = HW_REV_ERROR;
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}
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rcc_manager_disable_clock(&RCC->AHB1ENR, BITMASK_TO_BITNO(HW_REV_DETECT_RCC_FIELD));
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return revision;
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}
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