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ports/stm32: Add OpenMV PureThermal buzzer pin. #135

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Merged
merged 2 commits into from
Jul 22, 2025
Merged

ports/stm32: Add OpenMV PureThermal buzzer pin. #135

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fd17438
ports/stm32: Add OpenMV PureThermal buzzer pin.
kwagyeman Jul 21, 2025
f391623
ports/stm32: Add OpenMVPT early init.
kwagyeman Jul 22, 2025
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47 changes: 47 additions & 0 deletions ports/stm32/boards/OPENMVPT/board_init.c
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Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,53 @@
#define OMV_BOOTLOADER_MAGIC_ADDR (0x2001FFFCU)
#define OMV_BOOTLOADER_MAGIC_VALUE (0xB00710ADU)

void board_early_init(void) {
// Bring FLIR Lepton out of reset.
mp_hal_pin_config(pyb_pin_LEPTON_RSTN, MP_HAL_PIN_MODE_OUTPUT, MP_HAL_PIN_PULL_NONE, 0);
mp_hal_pin_config_speed(pyb_pin_LEPTON_RSTN, MP_HAL_PIN_SPEED_LOW);
mp_hal_pin_write(pyb_pin_LEPTON_RSTN, 1);

// Release powerdown.
mp_hal_pin_config(pyb_pin_LEPTON_PWDN, MP_HAL_PIN_MODE_OUTPUT, MP_HAL_PIN_PULL_NONE, 0);
mp_hal_pin_config_speed(pyb_pin_LEPTON_PWDN, MP_HAL_PIN_SPEED_LOW);
mp_hal_pin_write(pyb_pin_LEPTON_PWDN, 1);

// Enable FLIR Lepton MCLK.
mp_hal_pin_config(pyb_pin_LEPTON_MCLK, MP_HAL_PIN_MODE_ALT, MP_HAL_PIN_PULL_NONE, 4);
mp_hal_pin_config_speed(pyb_pin_LEPTON_MCLK, MP_HAL_PIN_SPEED_HIGH);

// Hardcode the clock frequency as SystemClock_Config() hasn't been called yet.
int tclk = 120000000 * 2; // HAL_RCC_GetPCLK2Freq() * 2
int period = (tclk / 24000000) - 1;

TIM_HandleTypeDef mclk_tim_handle;
mclk_tim_handle.Instance = TIM15;
mclk_tim_handle.Init.Prescaler = 0;
mclk_tim_handle.Init.CounterMode = TIM_COUNTERMODE_UP;
mclk_tim_handle.Init.Period = period;
mclk_tim_handle.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
mclk_tim_handle.Init.RepetitionCounter = 0;
mclk_tim_handle.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;

TIM_OC_InitTypeDef mclk_tim_oc_handle;
mclk_tim_oc_handle.Pulse = (period + 1) / 2;
mclk_tim_oc_handle.OCMode = TIM_OCMODE_PWM1;
mclk_tim_oc_handle.OCPolarity = TIM_OCPOLARITY_HIGH;
mclk_tim_oc_handle.OCNPolarity = TIM_OCNPOLARITY_HIGH;
mclk_tim_oc_handle.OCFastMode = TIM_OCFAST_DISABLE;
mclk_tim_oc_handle.OCIdleState = TIM_OCIDLESTATE_RESET;
mclk_tim_oc_handle.OCNIdleState = TIM_OCNIDLESTATE_RESET;

__HAL_RCC_TIM15_CLK_ENABLE();
__HAL_RCC_TIM15_CLK_SLEEP_ENABLE();
__HAL_RCC_TIM15_FORCE_RESET();
__HAL_RCC_TIM15_RELEASE_RESET();

HAL_TIM_PWM_Init(&mclk_tim_handle);
HAL_TIM_PWM_ConfigChannel(&mclk_tim_handle, &mclk_tim_oc_handle, TIM_CHANNEL_2);
HAL_TIM_PWM_Start(&mclk_tim_handle, TIM_CHANNEL_2);
}

void board_low_power(int mode) {
switch (mode) {
case 0: // Leave stop mode.
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3 changes: 3 additions & 0 deletions ports/stm32/boards/OPENMVPT/mpconfigboard.h
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Original file line number Diff line number Diff line change
Expand Up @@ -42,6 +42,9 @@ typedef unsigned int mp_uint_t; // must be pointer size
#define MICROPY_HW_SPIFLASH_SOFT_RESET (1)
#define MICROPY_HW_ENABLE_INTERNAL_FLASH_STORAGE (0)

#define MICROPY_BOARD_EARLY_INIT board_early_init
void board_early_init(void);

extern void board_enter_bootloader(void);
#define MICROPY_BOARD_ENTER_BOOTLOADER(nargs, args) board_enter_bootloader()

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4 changes: 4 additions & 0 deletions ports/stm32/boards/OPENMVPT/pins.csv
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Original file line number Diff line number Diff line change
Expand Up @@ -19,6 +19,7 @@ LED_WHITE,PG3
LED_RED,-PC0
LED_GREEN,-PC2
LED_BLUE,-PC1
BUZZER,PA1
PA4,PA4
PA15,PA15
PB3,PB3
Expand Down Expand Up @@ -105,3 +106,6 @@ TOUCH_SCL,PJ13
TOUCH_SDA,PJ14
TOUCH_INT,PJ6
WINC_INT,-PH5
LEPTON_RSTN,PD5
LEPTON_PWDN,PD4
LEPTON_MCLK,PA3
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