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stm32: Add support for STM32N6xx MCUs.

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This commit adds preliminary support for ST's new STM32N6xx MCUs.

Supported features of this MCU so far are:
- basic clock tree initialisation, running at 800MHz
- fully working USB
- XSPI in memory-mapped mode
- machine.Pin
- machine.UART
- RTC and deepsleep support
- SD card
- filesystem
- ROMFS
- WiFi and BLE via cyw43-driver (SDIO backend)

Note that the N6 does not have internal flash, and has some tricky boot
sequence, so using a custom bootloader (mboot) is almost a necessity.

Signed-off-by: Damien George <damien@micropython.org>
This commit is contained in:
Damien George
2024-06-18 17:46:21 +10:00
parent 24fd5f7268
commit eb3ea9ee13
42 changed files with 1659 additions and 135 deletions
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2
ports/stm32/machine_uart.c
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@@ -399,7 +399,7 @@ static bool mp_machine_uart_txdone(machine_uart_obj_t *self) {
// Send a break condition.
static void mp_machine_uart_sendbreak(machine_uart_obj_t *self) {
#if defined(STM32F0) || defined(STM32F7) || defined(STM32G0) || defined(STM32G4) || defined(STM32H5) || defined(STM32H7) || defined(STM32L0) || defined(STM32L4) || defined(STM32WB) || defined(STM32WL)
#if defined(STM32F0) || defined(STM32F7) || defined(STM32G0) || defined(STM32G4) || defined(STM32H5) || defined(STM32H7) || defined(STM32L0) || defined(STM32L4) || defined(STM32N6) || defined(STM32WB) || defined(STM32WL)
self->uartx->RQR = USART_RQR_SBKRQ; // write-only register
#else
self->uartx->CR1 |= USART_CR1_SBK;