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#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
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