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-rw-r--r--ports/stm32/machine_uart.c43
-rw-r--r--ports/stm32/main.c2
-rw-r--r--ports/stm32/mpbthciport.c2
-rw-r--r--ports/stm32/uart.c16
-rw-r--r--ports/stm32/uart.h2
5 files changed, 59 insertions, 6 deletions
diff --git a/ports/stm32/machine_uart.c b/ports/stm32/machine_uart.c
index 5bb5b6c99..4f251bd66 100644
--- a/ports/stm32/machine_uart.c
+++ b/ports/stm32/machine_uart.c
@@ -37,11 +37,20 @@
#include "irq.h"
#include "pendsv.h"
+#if defined(STM32H7)
+#define MICROPY_PY_MACHINE_UART_INV_ENTRY \
+ { MP_ROM_QSTR(MP_QSTR_INV_TX), MP_ROM_INT(UART_ADVFEATURE_TXINVERT_INIT) }, \
+ { MP_ROM_QSTR(MP_QSTR_INV_RX), MP_ROM_INT(UART_ADVFEATURE_RXINVERT_INIT) },
+#else
+#define MICROPY_PY_MACHINE_UART_INV_ENTRY
+#endif
+
#define MICROPY_PY_MACHINE_UART_CLASS_CONSTANTS \
{ MP_ROM_QSTR(MP_QSTR_RTS), MP_ROM_INT(UART_HWCONTROL_RTS) }, \
{ MP_ROM_QSTR(MP_QSTR_CTS), MP_ROM_INT(UART_HWCONTROL_CTS) }, \
{ MP_ROM_QSTR(MP_QSTR_IRQ_RXIDLE), MP_ROM_INT(UART_FLAG_IDLE) }, \
{ MP_ROM_QSTR(MP_QSTR_IRQ_RX), MP_ROM_INT(UART_FLAG_RXNE) }, \
+ MICROPY_PY_MACHINE_UART_INV_ENTRY \
static void mp_machine_uart_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
machine_uart_obj_t *self = MP_OBJ_TO_PTR(self_in);
@@ -125,11 +134,27 @@ static void mp_machine_uart_print(const mp_print_t *print, mp_obj_t self_in, mp_
if (self->mp_irq_trigger != 0) {
mp_printf(print, "; irq=0x%x", self->mp_irq_trigger);
}
+ #if defined(STM32H7)
+ mp_print_str(print, ", invert=");
+ if (!(cr2 & (USART_CR2_TXINV | USART_CR2_RXINV))) {
+ mp_print_str(print, "0");
+ } else {
+ if (cr2 & USART_CR2_TXINV) {
+ mp_print_str(print, "INV_TX");
+ if (cr2 & USART_CR2_RXINV) {
+ mp_print_str(print, "|");
+ }
+ }
+ if (cr2 & USART_CR2_RXINV) {
+ mp_print_str(print, "INV_RX");
+ }
+ }
+ #endif
mp_print_str(print, ")");
}
}
-/// \method init(baudrate, bits=8, parity=None, stop=1, *, timeout=1000, timeout_char=0, flow=0, read_buf_len=64)
+/// \method init(baudrate, bits=8, parity=None, stop=1, *, timeout=1000, timeout_char=0, flow=0, read_buf_len=64, invert=0)
///
/// Initialise the UART bus with the given parameters:
///
@@ -141,6 +166,7 @@ static void mp_machine_uart_print(const mp_print_t *print, mp_obj_t self_in, mp_
/// - `timeout_char` is the timeout in milliseconds to wait between characters.
/// - `flow` is RTS | CTS where RTS == 256, CTS == 512
/// - `read_buf_len` is the character length of the read buffer (0 to disable).
+/// - `invert` specifies which lines to invert. INV_TX | INV_RX (0 to disable). --> Only for STM32H7
static void mp_machine_uart_init_helper(machine_uart_obj_t *self, size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
static const mp_arg_t allowed_args[] = {
{ MP_QSTR_baudrate, MP_ARG_REQUIRED | MP_ARG_INT, {.u_int = 9600} },
@@ -152,11 +178,17 @@ static void mp_machine_uart_init_helper(machine_uart_obj_t *self, size_t n_args,
{ MP_QSTR_timeout_char, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
{ MP_QSTR_rxbuf, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = -1} },
{ MP_QSTR_read_buf_len, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 64} }, // legacy
+ #if defined(STM32H7)
+ { MP_QSTR_invert, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
+ #endif
};
// parse args
struct {
mp_arg_val_t baudrate, bits, parity, stop, flow, timeout, timeout_char, rxbuf, read_buf_len;
+ #if defined(STM32H7)
+ mp_arg_val_t invert;
+ #endif
} args;
mp_arg_parse_all(n_args, pos_args, kw_args,
MP_ARRAY_SIZE(allowed_args), allowed_args, (mp_arg_val_t *)&args);
@@ -202,11 +234,18 @@ static void mp_machine_uart_init_helper(machine_uart_obj_t *self, size_t n_args,
// flow control
uint32_t flow = args.flow.u_int;
+ // inverted
+ #if defined(STM32H7)
+ uint32_t invert = args.invert.u_int;
+ #else
+ uint32_t invert = 0;
+ #endif
+
// Save attach_to_repl setting because uart_init will disable it.
bool attach_to_repl = self->attached_to_repl;
// init UART (if it fails, it's because the port doesn't exist)
- if (!uart_init(self, baudrate, bits, parity, stop, flow)) {
+ if (!uart_init(self, baudrate, bits, parity, stop, flow, invert)) {
mp_raise_msg_varg(&mp_type_ValueError, MP_ERROR_TEXT("UART(%d) doesn't exist"), self->uart_id);
}
diff --git a/ports/stm32/main.c b/ports/stm32/main.c
index 9ac2b4490..1c59b6479 100644
--- a/ports/stm32/main.c
+++ b/ports/stm32/main.c
@@ -502,7 +502,7 @@ void stm32_main(uint32_t reset_mode) {
pyb_uart_repl_obj.is_static = true;
pyb_uart_repl_obj.timeout = 0;
pyb_uart_repl_obj.timeout_char = 2;
- uart_init(&pyb_uart_repl_obj, MICROPY_HW_UART_REPL_BAUD, UART_WORDLENGTH_8B, UART_PARITY_NONE, UART_STOPBITS_1, 0);
+ uart_init(&pyb_uart_repl_obj, MICROPY_HW_UART_REPL_BAUD, UART_WORDLENGTH_8B, UART_PARITY_NONE, UART_STOPBITS_1, 0, 0);
uart_set_rxbuf(&pyb_uart_repl_obj, sizeof(pyb_uart_repl_rxbuf), pyb_uart_repl_rxbuf);
uart_attach_to_repl(&pyb_uart_repl_obj, true);
MP_STATE_PORT(machine_uart_obj_all)[MICROPY_HW_UART_REPL - 1] = &pyb_uart_repl_obj;
diff --git a/ports/stm32/mpbthciport.c b/ports/stm32/mpbthciport.c
index 3f7114683..d8be24765 100644
--- a/ports/stm32/mpbthciport.c
+++ b/ports/stm32/mpbthciport.c
@@ -184,7 +184,7 @@ int mp_bluetooth_hci_uart_init(uint32_t port, uint32_t baudrate) {
MP_STATE_PORT(machine_uart_obj_all)[mp_bluetooth_hci_uart_obj.uart_id - 1] = &mp_bluetooth_hci_uart_obj;
// Initialise the UART.
- uart_init(&mp_bluetooth_hci_uart_obj, baudrate, UART_WORDLENGTH_8B, UART_PARITY_NONE, UART_STOPBITS_1, UART_HWCONTROL_RTS | UART_HWCONTROL_CTS);
+ uart_init(&mp_bluetooth_hci_uart_obj, baudrate, UART_WORDLENGTH_8B, UART_PARITY_NONE, UART_STOPBITS_1, UART_HWCONTROL_RTS | UART_HWCONTROL_CTS, 0);
uart_set_rxbuf(&mp_bluetooth_hci_uart_obj, sizeof(hci_uart_rxbuf), hci_uart_rxbuf);
// Add IRQ handler for IDLE (i.e. packet finished).
diff --git a/ports/stm32/uart.c b/ports/stm32/uart.c
index 73e36881a..f1637fd49 100644
--- a/ports/stm32/uart.c
+++ b/ports/stm32/uart.c
@@ -265,7 +265,7 @@ bool uart_exists(int uart_id) {
// assumes Init parameters have been set up correctly
bool uart_init(machine_uart_obj_t *uart_obj,
- uint32_t baudrate, uint32_t bits, uint32_t parity, uint32_t stop, uint32_t flow) {
+ uint32_t baudrate, uint32_t bits, uint32_t parity, uint32_t stop, uint32_t flow, uint32_t invert) {
USART_TypeDef *UARTx;
IRQn_Type irqn;
uint8_t uart_fn = AF_FN_UART;
@@ -677,6 +677,20 @@ bool uart_init(machine_uart_obj_t *uart_obj,
huart.Init.ClockPrescaler = UART_PRESCALER_DIV16;
#endif
+ #if defined(STM32H7)
+ huart.AdvancedInit.AdvFeatureInit = (UART_ADVFEATURE_TXINVERT_INIT | UART_ADVFEATURE_RXINVERT_INIT);
+ if (invert & UART_ADVFEATURE_RXINVERT_INIT) {
+ huart.AdvancedInit.RxPinLevelInvert = UART_ADVFEATURE_RXINV_ENABLE;
+ } else {
+ huart.AdvancedInit.RxPinLevelInvert = UART_ADVFEATURE_RXINV_DISABLE;
+ }
+ if (invert & UART_ADVFEATURE_TXINVERT_INIT) {
+ huart.AdvancedInit.TxPinLevelInvert = UART_ADVFEATURE_TXINV_ENABLE;
+ } else {
+ huart.AdvancedInit.TxPinLevelInvert = UART_ADVFEATURE_TXINV_DISABLE;
+ }
+ #endif
+
#if defined(STM32G4) || defined(STM32H7) || defined(STM32N6) // WB also has a fifo..
huart.FifoMode = UART_FIFOMODE_ENABLE;
#endif
diff --git a/ports/stm32/uart.h b/ports/stm32/uart.h
index d92434c64..448140f17 100644
--- a/ports/stm32/uart.h
+++ b/ports/stm32/uart.h
@@ -87,7 +87,7 @@ void uart_init0(void);
void uart_deinit_all(void);
bool uart_exists(int uart_id);
bool uart_init(machine_uart_obj_t *uart_obj,
- uint32_t baudrate, uint32_t bits, uint32_t parity, uint32_t stop, uint32_t flow);
+ uint32_t baudrate, uint32_t bits, uint32_t parity, uint32_t stop, uint32_t flow, uint32_t invert);
void uart_irq_config(machine_uart_obj_t *self, bool enable);
void uart_set_rxbuf(machine_uart_obj_t *self, size_t len, void *buf);
void uart_deinit(machine_uart_obj_t *uart_obj);
generated by cgit v1.2.3 (git 2.46.0) at 2025-11-04 22:47:10 +0000