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mimxrt/machine_uart: Remove duplicate init and make IRQ optional.

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Changes:
- The duplicate LPUART_Init call was not needed, just an edit fail.
- Allow a port to disable UART.irq().  Some code for configuration stays,
  but the respective UART IRQ is not enabled.  Calling uart.irq() will
  cause an exception by extmod/machine_uart.c.

Signed-off-by: robert-hh <robert@hammelrath.com>
This commit is contained in:
robert-hh
2025-02-22 16:20:50 +01:00
committed by Damien George
parent 2a5b97beae
commit 2d20dbce2c
2 changed files with 9 additions and 3 deletions
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10
ports/mimxrt/machine_uart.c
View File

@@ -326,22 +326,23 @@ static void mp_machine_uart_init_helper(machine_uart_obj_t *self, size_t n_args,
self->timeout_char = min_timeout_char;
}
self->config.rxIdleType = kLPUART_IdleTypeStartBit;
self->config.rxIdleConfig = kLPUART_IdleCharacter4;
#if defined(MIMXRT117x_SERIES)
// Use the Lpuart1 clock value, which is set for All UART devices.
LPUART_Init(self->lpuart, &self->config, CLOCK_GetRootClockFreq(kCLOCK_Root_Lpuart1));
#else
LPUART_Init(self->lpuart, &self->config, CLOCK_GetClockRootFreq(kCLOCK_UartClkRoot));
#endif
self->config.rxIdleType = kLPUART_IdleTypeStartBit;
self->config.rxIdleConfig = kLPUART_IdleCharacter4;
LPUART_Init(self->lpuart, &self->config, BOARD_BOOTCLOCKRUN_UART_CLK_ROOT);
LPUART_TransferCreateHandle(self->lpuart, &self->handle, LPUART_UserCallback, self);
uint8_t *buffer = m_new(uint8_t, rxbuf_len + 1);
LPUART_TransferStartRingBuffer(self->lpuart, &self->handle, buffer, rxbuf_len);
self->txbuf = m_new(uint8_t, txbuf_len); // Allocate the TX buffer.
self->txbuf_len = txbuf_len;
#if MICROPY_PY_MACHINE_UART_IRQ
LPUART_EnableInterrupts(self->lpuart, kLPUART_IdleLineInterruptEnable);
#endif
// The Uart supports inverting, but not the fsl API, so it has to coded directly
// And it has to be done after LPUART_Init.
@@ -381,6 +382,7 @@ static mp_obj_t mp_machine_uart_make_new(const mp_obj_type_t *type, size_t n_arg
self->timeout_char = 1;
self->new = true;
self->mp_irq_obj = NULL;
self->mp_irq_trigger = 0;
LPUART_GetDefaultConfig(&self->config);
@@ -427,6 +429,7 @@ void machine_uart_deinit_all(void) {
}
}
#if MICROPY_PY_MACHINE_UART_IRQ
static mp_uint_t uart_irq_trigger(mp_obj_t self_in, mp_uint_t new_trigger) {
machine_uart_obj_t *self = MP_OBJ_TO_PTR(self_in);
self->mp_irq_trigger = new_trigger;
@@ -475,6 +478,7 @@ static mp_irq_obj_t *mp_machine_uart_irq(machine_uart_obj_t *self, bool any_args
return self->mp_irq_obj;
}
#endif
static mp_uint_t mp_machine_uart_read(mp_obj_t self_in, void *buf_in, mp_uint_t size, int *errcode) {
machine_uart_obj_t *self = MP_OBJ_TO_PTR(self_in);

2
ports/mimxrt/mpconfigport.h
View File

@@ -114,7 +114,9 @@ uint32_t trng_random_u32(void);
#define MICROPY_PY_MACHINE_UART (1)
#define MICROPY_PY_MACHINE_UART_INCLUDEFILE "ports/mimxrt/machine_uart.c"
#define MICROPY_PY_MACHINE_UART_SENDBREAK (1)
#ifndef MICROPY_PY_MACHINE_UART_IRQ
#define MICROPY_PY_MACHINE_UART_IRQ (1)
#endif
#define MICROPY_PY_ONEWIRE (1)
#define MICROPY_PY_MACHINE_BOOTLOADER (1)