mirror of
https://github.com/licsber/micropython.git
synced 2024-09-20 00:50:24 +08:00
e7332b0584
Adds support for 3 Cortex-M boards, selectable via "BOARD" in the Makefile: - microbit, Cortex-M0 via nRF51822 - netduino2, Cortex-M3 via STM32F205 - mps2-an385, Cortex-M3 via FPGA netduino2 is the default board because it's supported by older qemu versions (down to at least 2.5.0).
79 lines
1.5 KiB
C
79 lines
1.5 KiB
C
#include <stdint.h>
|
|
#include <stddef.h>
|
|
|
|
#include "uart.h"
|
|
|
|
#if defined(QEMU_SOC_STM32)
|
|
|
|
typedef struct _UART_t {
|
|
volatile uint32_t SR;
|
|
volatile uint32_t DR;
|
|
} UART_t;
|
|
|
|
#define UART0 ((UART_t*)(0x40011000))
|
|
|
|
void uart_init(void) {
|
|
}
|
|
|
|
void uart_tx_strn(const char *buf, size_t len) {
|
|
for (size_t i = 0; i < len; ++i) {
|
|
UART0->DR = buf[i];
|
|
}
|
|
}
|
|
|
|
#elif defined(QEMU_SOC_NRF51)
|
|
|
|
typedef struct _UART_t {
|
|
volatile uint32_t r0[2];
|
|
volatile uint32_t STARTTX; // 0x008
|
|
volatile uint32_t r1[(0x500 - 0x008) / 4 - 1];
|
|
volatile uint32_t ENABLE; // 0x500
|
|
volatile uint32_t r2[(0x51c - 0x500) / 4 - 1];
|
|
volatile uint32_t TXD; // 0x51c
|
|
} UART_t;
|
|
|
|
#define UART0 ((UART_t*)(0x40002000))
|
|
|
|
void uart_init(void) {
|
|
UART0->ENABLE = 4;
|
|
UART0->STARTTX = 1;
|
|
}
|
|
|
|
void uart_tx_strn(const char *buf, size_t len) {
|
|
for (size_t i = 0; i < len; ++i) {
|
|
UART0->TXD = buf[i];
|
|
}
|
|
}
|
|
|
|
#elif defined(QEMU_SOC_MPS2)
|
|
|
|
#define UART_STATE_TXFULL (1 << 0)
|
|
|
|
#define UART_CTRL_TX_EN (1 << 0)
|
|
#define UART_CTRL_RX_EN (1 << 1)
|
|
|
|
typedef struct _UART_t {
|
|
volatile uint32_t DATA;
|
|
volatile uint32_t STATE;
|
|
volatile uint32_t CTRL;
|
|
volatile uint32_t INTSTATUS;
|
|
volatile uint32_t BAUDDIV;
|
|
} UART_t;
|
|
|
|
#define UART0 ((UART_t*)(0x40004000))
|
|
|
|
void uart_init(void) {
|
|
UART0->BAUDDIV = 16;
|
|
UART0->CTRL = UART_CTRL_TX_EN;
|
|
}
|
|
|
|
void uart_tx_strn(const char *buf, size_t len) {
|
|
for (size_t i = 0; i < len; ++i) {
|
|
while (UART0->STATE & UART_STATE_TXFULL) {
|
|
}
|
|
UART0->DATA = buf[i];
|
|
}
|
|
}
|
|
|
|
#endif
|