mhu/reflow-oven-control-sw
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Add PCB/Hardware version detection

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Mario Hüttel
2020-11-29 19:02:30 +01:00
parent 32da2a5fa6
commit f4d6f5a1ae
3 changed files with 67 additions and 2 deletions
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48
stm-firmware/hw-version-detect.c Normal file
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#include <reflow-controller/hw-version-detect.h>
#include <stm-periph/clock-enable-manager.h>
#include <stm32/stm32f4xx.h>
#define HW_REV_DETECT_GPIO GPIOE
#define HW_REV_DETECT_RCC_FIELD RCC_AHB1ENR_GPIOEEN
#define HW_REV_DETECT_PIN_LOW (8U)
#define HW_REV_DETECT_PIN_HIGH (15U)
enum hw_revision get_pcb_hardware_version(void)
{
uint8_t current_pin;
uint16_t port_bitmask = 0U;
static enum hw_revision revision = HW_REV_NOT_DETECTED;
if (revision != HW_REV_NOT_DETECTED)
return revision;
rcc_manager_enable_clock(&RCC->AHB1ENR, BITMASK_TO_BITNO(HW_REV_DETECT_RCC_FIELD));
/* Setup the pins as input with pull up */
for (current_pin = HW_REV_DETECT_PIN_LOW; current_pin <= HW_REV_DETECT_PIN_HIGH; current_pin++) {
HW_REV_DETECT_GPIO->MODER &= MODER_DELETE(current_pin);
HW_REV_DETECT_GPIO->PUPDR &= PUPDR_DELETE(current_pin);
HW_REV_DETECT_GPIO->PUPDR |= PULLUP(current_pin);
}
/* Loop again and read in the pin mask */
for (current_pin = HW_REV_DETECT_PIN_LOW; current_pin <= HW_REV_DETECT_PIN_HIGH; current_pin++) {
port_bitmask <<= 1;
port_bitmask |= (HW_REV_DETECT_GPIO->IDR & (1 << current_pin)) ? 0x0 : 0x1;
}
switch (port_bitmask) {
case 0U:
revision = HW_REV_V1_2;
break;
case 1U:
revision = HW_REV_V1_3;
break;
default:
revision = HW_REV_ERROR;
}
rcc_manager_disable_clock(&RCC->AHB1ENR, BITMASK_TO_BITNO(HW_REV_DETECT_RCC_FIELD));
return revision;
}