diff options
Diffstat (limited to 'ports/stm32/machine_uart.c')
| -rw-r--r-- | ports/stm32/machine_uart.c | 43 |
1 files changed, 41 insertions, 2 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); } |