ARM9教程DSP教程FPGA教程CPLD教程12A软硬件设计0229(16)

ARM9教程DSP教程FPGA教程CPLD教程12A软硬件设计0229

void srl0_put_byte_blocking( unsigned int base, unsigned char val ) {

SET_UART_TI(base, 0); UART_SBUF(base) = val;

while( !GET_UART_TI(base) ) ; }

unsigned char srl0_get_byte( unsigned int base ) {

unsigned char retval = -1; if ( GET_UART_RI(base) ) {

retval = UART_SBUF(base); SET_UART_RI(base, 0); }

return retval; }

unsigned char srl0_get_byte_blocking( unsigned int base ) {

unsigned char retval; while (! GET_UART_RI(base)) { }

retval = UART_SBUF(base); SET_UART_RI(base, 0); return retval; }

int srl0_receive_byte(srl0_receive_buffer_t *buffer, char *buf)