STATIC mp_uint_t pyb_uart_read(mp_obj_t self_in, void *buf_in, mp_uint_t size, int *errcode) {
pyb_uart_obj_t *self = self_in;
byte *buf = buf_in;
// make sure we want at least 1 char
if (size == 0) {
return 0;
}
// wait for first char to become available
if (!uart_rx_wait(self, self->timeout)) {
// we can either return 0 to indicate EOF (then read() method returns b'')
// or return EAGAIN error to indicate non-blocking (then read() method returns None)
return 0;
}
// read the data
byte *orig_buf = buf;
for (;;) {
*buf++ = uart_rx_char(self);
if (--size == 0 || !uart_rx_wait(self, self->timeout_char)) {
// return number of bytes read
return buf - orig_buf;
}
}
}
/// \method readchar()
/// Receive a single character on the bus.
/// Return value: The character read, as an integer. Returns -1 on timeout.
STATIC mp_obj_t pyb_uart_readchar(mp_obj_t self_in) {
pyb_uart_obj_t *self = self_in;
if (uart_rx_wait(self, self->timeout)) {
return mp_obj_new_int(uart_rx_char(self));
} else {
// return -1 on timeout
return MP_OBJ_NEW_SMALL_INT(-1);
}
}
int mp_hal_stdin_rx_chr(void) {
for (;;) {
byte c;
if (usb_vcp_recv_byte(&c) != 0) {
return c;
} else if (MP_STATE_PORT(pyb_stdio_uart) != NULL && uart_rx_any(MP_STATE_PORT(pyb_stdio_uart))) {
return uart_rx_char(MP_STATE_PORT(pyb_stdio_uart));
}
__WFI();
}
}
int stdin_rx_chr(void) {
for (;;) {
#if 0
#ifdef USE_HOST_MODE
pyb_usb_host_process();
int c = pyb_usb_host_get_keyboard();
if (c != 0) {
return c;
}
#endif
#endif
byte c;
if (usb_vcp_recv_byte(&c) != 0) {
return c;
} else if (pyb_stdio_uart != PYB_UART_NONE && uart_rx_any(pyb_stdio_uart)) {
return uart_rx_char(pyb_stdio_uart);
}
__WFI();
}
}
int mp_hal_stdin_rx_chr(void) {
for (;;) {
#if 0
#ifdef USE_HOST_MODE
pyb_usb_host_process();
int c = pyb_usb_host_get_keyboard();
if (c != 0) {
return c;
}
#endif
#endif
byte c;
if (usb_vcp_recv_byte(&c) != 0) {
return c;
} else if (MP_STATE_PORT(pyb_stdio_uart) != NULL && uart_rx_any(MP_STATE_PORT(pyb_stdio_uart))) {
return uart_rx_char(MP_STATE_PORT(pyb_stdio_uart));
}
__WFI();
}
}
void main(void)
{
stop_watchdog();
set_clk_8MHz();
//interrupts_enable();
lcd_init();
uart_init();
/*
* Read a regiser (data[1]) and print register and value on the display
* */
unsigned char i2creceive[8];
i2c_master_init();
unsigned char data[1] = {0x6F};
lcd_goto(1,0);
lcd_print("R: ");
lcd_print(int2HEXcharArray(*data));
lcd_goto(2,0);
lcd_print("V: ");
i2c_writeByte(1,data,0x50);
__delay_cycles(300); // delay some time to get a better view on the signals
unsigned char rx_byte = i2c_receiveSingleByte(0x50);
__delay_cycles(300);
lcd_print(int2HEXcharArray(rx_byte));
/*
* receive 256 register values via UART and write them to the EEPROM (incrementing address from 0x00 to 0xFF)
* */
///*
unsigned char write_byte[2];
unsigned int write_counter = 0;
while(write_counter < 255) {
lcd_goto(2,0);
write_byte[0] = write_counter;
write_byte[1] = uart_rx_char();
lcd_print(int2HEXcharArray(write_byte[1]));
i2c_writeByte(2,write_byte,0x50);
write_counter = write_counter + 1;
}
//*/
/*
* Read out a register value and print it on the display to verify the write process
* */
lcd_goto(2,0);
lcd_print("V: ");
i2c_writeByte(1,data,0x50);
rx_byte = i2c_receiveSingleByte(0x50);
__delay_cycles(300);
lcd_print(int2HEXcharArray(rx_byte));
__delay_cycles(300);
for (;;)
{
}
}