Fix I2C Repeated start error by converting to IT mode
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0c0b517112
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@ -61,6 +61,7 @@ STATIC bool never_reset_i2c[MAX_I2C];
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#define ALL_CLOCKS 0xFF
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STATIC void i2c_clock_enable(uint8_t mask);
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STATIC void i2c_clock_disable(uint8_t mask);
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STATIC void i2c_assign_irq(busio_i2c_obj_t *self, I2C_TypeDef * I2Cx);
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void i2c_reset(void) {
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uint16_t never_reset_mask = 0x00;
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@ -136,6 +137,10 @@ void common_hal_busio_i2c_construct(busio_i2c_obj_t *self,
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i2c_clock_enable(1 << (self->sda->periph_index - 1));
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reserved_i2c[self->sda->periph_index - 1] = true;
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// Create root pointer and assign IRQ
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MP_STATE_PORT(cpy_i2c_obj_all)[self->sda->periph_index - 1] = self;
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i2c_assign_irq(self, I2Cx);
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// Handle the HAL handle differences
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#if (CPY_STM32H7 || CPY_STM32F7)
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if (frequency == 400000) {
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@ -163,6 +168,13 @@ void common_hal_busio_i2c_construct(busio_i2c_obj_t *self,
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}
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common_hal_mcu_pin_claim(sda);
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common_hal_mcu_pin_claim(scl);
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self->frame_in_prog = false;
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//start the receive interrupt chain
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HAL_NVIC_DisableIRQ(self->irq); //prevent handle lock contention
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HAL_NVIC_SetPriority(self->irq, 1, 0);
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HAL_NVIC_EnableIRQ(self->irq);
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}
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void common_hal_busio_i2c_never_reset(busio_i2c_obj_t *self) {
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@ -229,15 +241,46 @@ void common_hal_busio_i2c_unlock(busio_i2c_obj_t *self) {
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uint8_t common_hal_busio_i2c_write(busio_i2c_obj_t *self, uint16_t addr,
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const uint8_t *data, size_t len, bool transmit_stop_bit) {
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HAL_StatusTypeDef result = HAL_I2C_Master_Transmit(&(self->handle), (uint16_t)(addr << 1),
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HAL_StatusTypeDef result;
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if (!transmit_stop_bit) {
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uint32_t xfer_opt;
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if (!self->frame_in_prog) {
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xfer_opt = I2C_FIRST_FRAME;
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} else {
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// handle rare possibility of multiple restart writes in a row
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xfer_opt = I2C_NEXT_FRAME;
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}
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result = HAL_I2C_Master_Seq_Transmit_IT(&(self->handle),
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(uint16_t)(addr << 1), (uint8_t *)data,
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(uint16_t)len, xfer_opt);
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while (HAL_I2C_GetState(&(self->handle)) != HAL_I2C_STATE_READY)
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{
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RUN_BACKGROUND_TASKS;
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}
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self->frame_in_prog = true;
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} else {
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result = HAL_I2C_Master_Transmit(&(self->handle), (uint16_t)(addr << 1),
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(uint8_t *)data, (uint16_t)len, 500);
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}
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return result == HAL_OK ? 0 : MP_EIO;
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}
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uint8_t common_hal_busio_i2c_read(busio_i2c_obj_t *self, uint16_t addr,
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uint8_t *data, size_t len) {
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return HAL_I2C_Master_Receive(&(self->handle), (uint16_t)(addr<<1), data, (uint16_t)len, 500)
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if (!self->frame_in_prog) {
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return HAL_I2C_Master_Receive(&(self->handle), (uint16_t)(addr<<1), data, (uint16_t)len, 500)
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== HAL_OK ? 0 : MP_EIO;
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} else {
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HAL_StatusTypeDef result = HAL_I2C_Master_Seq_Receive_IT(&(self->handle),
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(uint16_t)(addr << 1), (uint8_t *)data,
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(uint16_t)len, I2C_LAST_FRAME);
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while (HAL_I2C_GetState(&(self->handle)) != HAL_I2C_STATE_READY)
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{
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RUN_BACKGROUND_TASKS;
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}
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self->frame_in_prog = false;
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return result;
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}
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}
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STATIC void i2c_clock_enable(uint8_t mask) {
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@ -294,3 +337,48 @@ STATIC void i2c_clock_disable(uint8_t mask) {
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}
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#endif
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}
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STATIC void i2c_assign_irq(busio_i2c_obj_t *self, I2C_TypeDef * I2Cx) {
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#ifdef I2C1
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if (I2Cx == I2C1) {
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self->irq = I2C1_EV_IRQn;
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}
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#endif
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#ifdef I2C2
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if (I2Cx == I2C2) {
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self->irq = I2C2_EV_IRQn;
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}
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#endif
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#ifdef I2C3
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if (I2Cx == I2C3) {
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self->irq = I2C3_EV_IRQn;
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}
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#endif
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#ifdef I2C4
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if (I2Cx == I2C4) {
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self->irq = I2C4_EV_IRQn;
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}
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#endif
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}
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STATIC void call_hal_irq(int i2c_num) {
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//Create casted context pointer
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busio_i2c_obj_t * context = (busio_i2c_obj_t*)MP_STATE_PORT(cpy_i2c_obj_all)[i2c_num - 1];
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if (context != NULL) {
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HAL_NVIC_ClearPendingIRQ(context->irq);
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HAL_I2C_EV_IRQHandler(&context->handle);
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}
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}
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void I2C1_EV_IRQHandler(void) {
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call_hal_irq(1);
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}
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void I2C2_EV_IRQHandler(void) {
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call_hal_irq(2);
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}
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void I2C3_EV_IRQHandler(void) {
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call_hal_irq(3);
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}
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void I2C4_EV_IRQHandler(void) {
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call_hal_irq(4);
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}
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@ -37,6 +37,8 @@
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typedef struct {
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mp_obj_base_t base;
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I2C_HandleTypeDef handle;
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IRQn_Type irq;
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bool frame_in_prog;
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bool has_lock;
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const mcu_periph_obj_t *scl;
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const mcu_periph_obj_t *sda;
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@ -52,10 +52,14 @@ extern uint8_t _ld_default_stack_size;
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#define BOARD_NO_VBUS_SENSE (0)
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#endif
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#define MAX_UART 10 //how many UART are implemented
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// Peripheral implementation counts
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#define MAX_UART 10
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#define MAX_I2C 4
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#define MAX_SPI 6
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#define MICROPY_PORT_ROOT_POINTERS \
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void *cpy_uart_obj_all[MAX_UART]; \
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void *cpy_i2c_obj_all[MAX_I2C]; \
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CIRCUITPY_COMMON_ROOT_POINTERS
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#endif // __INCLUDED_MPCONFIGPORT_H
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