Heth: Created page with "The following code is a simple implementation on console function inplementing STDIN/STDOUT and STDERR on '''uca1''' on MSP430F5529 #include "io430...."

2022-12-08T06:13:51Z

Created page with "The following code is a simple implementation on console function inplementing STDIN/STDOUT and STDERR on '''uca1''' on MSP430F5529 <source lang=c line> #include "io430...."

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The following code is a simple implementation on console function inplementing STDIN/STDOUT and STDERR on '''uca1''' on [[MSP430F5529]]

<source lang=c line>
#include "io430.h"
#include <stddef.h>

void uart_init( ) {

P4SEL = BIT4+BIT5; // P3.4,5 = USCI_A1 TXD/RXD
UCA1CTL1 |= UCSWRST; // **Put state machine in reset**
UCA1CTL1 |= UCSSEL_1; // CLK = ACLK
UCA1BR0 = 0x03; // 32kHz/9600=3.41 (see User's Guide)
UCA1BR1 = 0x00; //
UCA1MCTL = UCBRS_3+UCBRF_0; // Modulation UCBRSx=3, UCBRFx=0
UCA1CTL1 &= ~UCSWRST; // **Initialize USCI state machine**

}

//cin - Character in
// Poll USCI_A0 receive register until character received.
// Parameters: none
// Returns: unsigned char - character received
unsigned char cin( void ) {
while ( !(0x01 & UCA1IFG) );
return(UCA1RXBUF);
}
//cin_nonblocked
//If character received - return it
//Else return 0x00 - No character received
unsigned char cin_nonblocked( void ) {
if ( 0x01 & UCA1IFG ) {
return(UCA1RXBUF);
} else {
return(0x00);
}
}

//cou - Character out
// Transmit character poll USCI_A0 transmit register until ready.
// Parameters: Character to transmit
// Returns: none
int cout( unsigned char c ) {
while ( !(0x02 & UCA1IFG) ); //&& (count++ > 0) );
UCA1TXBUF = c;
if (c == '\n')
cout('\r');
return(c);
}

/*
THE DLIB LOW-LEVEL I/O INTERFACE
- See IAR C-compiler manual
- See skeleton functions in IAR installation ./430/src/lib/dlib
*/
#include <yfuns.h>
// __read() - DLIB-low level file i/o - defaults to console STDIN
size_t __read(int handle, unsigned char * buffer, size_t size) {
int nChars = 0;

/* This template only reads from "standard in", for all other file
* handles it returns failure. */
if (handle != _LLIO_STDIN) {
return _LLIO_ERROR;
}

for (/* Empty */; size > 0; --size) {
int c = cin();
if (c < 0)
break;

*buffer++ = c;
++nChars;
}

return nChars;
}

// __write() - DLIB-low level file i/o - defaults to console STDOUT and STDERR
size_t __write(int handle, const unsigned char * buffer, size_t size) {

size_t nChars = 0;

if (buffer == 0) {
/*
* This means that we should flush internal buffers. Since we
* don't we just return. (Remember, "handle" == -1 means that all
* handles should be flushed.)
*/
return 0;
}

/* This template only writes to "standard out" and "standard err",
* for all other file handles it returns failure. */
if (handle != _LLIO_STDOUT && handle != _LLIO_STDERR) {
return _LLIO_ERROR;
}
for (/* Empty */; size != 0; --size) {
if (cout(*buffer++) < 0) {
return _LLIO_ERROR;
}
++nChars;
}
return nChars;
}
</source>
[[Category:MSP430]]

MSP430F5529/UART console - Revision history

Heth: Created page with "The following code is a simple implementation on console function inplementing STDIN/STDOUT and STDERR on '''uca1''' on MSP430F5529 #include "io430...."