#include #define UART0_BASE 0x53FBC000 #define UART0_SR (*((volatile uint32_t *) (UART0_BASE + 0x00))) #define UART0_DR (*((volatile uint32_t *) (UART0_BASE + 0x40))) #define UART0_SR_RX_DATA_EMPTY (1 << 0) #define UART0_SR_TX_FULL (1 << 1) /* // Set up stack pointer asm("_start:\ xor sp, sp, sp;\ lui sp, 0x80100;\ j main;\ "); */ __attribute__((noreturn)) void _start() { uint8_t state = 0; uint8_t c='a'; uint8_t opcode; uint8_t *ptr; uint32_t length; uint32_t sr; while (1) { UART0_DR = c++; } }