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Diffstat (limited to 'peripheral/libmraa/src/uart/uart.c')
-rw-r--r--peripheral/libmraa/src/uart/uart.c537
1 files changed, 0 insertions, 537 deletions
diff --git a/peripheral/libmraa/src/uart/uart.c b/peripheral/libmraa/src/uart/uart.c
deleted file mode 100644
index 0f8a2e3..0000000
--- a/peripheral/libmraa/src/uart/uart.c
+++ /dev/null
@@ -1,537 +0,0 @@
-/*
- * Author: Thomas Ingleby <thomas.c.ingleby@intel.com>
- * Contributions: Jon Trulson <jtrulson@ics.com>
- * Brendan le Foll <brendan.le.foll@intel.com>
- * Copyright (c) 2014 - 2015 Intel Corporation.
- *
- * Permission is hereby granted, free of charge, to any person obtaining
- * a copy of this software and associated documentation files (the
- * "Software"), to deal in the Software without restriction, including
- * without limitation the rights to use, copy, modify, merge, publish,
- * distribute, sublicense, and/or sell copies of the Software, and to
- * permit persons to whom the Software is furnished to do so, subject to
- * the following conditions:
- *
- * The above copyright notice and this permission notice shall be
- * included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
- * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
- * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
- * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-#include <stdlib.h>
-#include <sys/stat.h>
-#include <unistd.h>
-#include <string.h>
-#include <termios.h>
-#include <sys/select.h>
-
-#include "uart.h"
-#include "mraa_internal.h"
-
-#ifndef CMSPAR
-#define CMSPAR 010000000000
-#endif
-
-// This function takes an unsigned int and converts it to a B* speed_t
-// that can be used with linux/posix termios
-static speed_t
-uint2speed(unsigned int speed)
-{
- switch (speed) {
- case 0:
- return B0; // hangup, not too useful otherwise
- case 50:
- return B50;
- case 75:
- return B75;
- case 110:
- return B110;
- case 150:
- return B150;
- case 200:
- return B200;
- case 300:
- return B300;
- case 600:
- return B600;
- case 1200:
- return B1200;
- case 1800:
- return B1800;
- case 2400:
- return B2400;
- case 4800:
- return B4800;
- case 9600:
- return B9600;
- case 19200:
- return B19200;
- case 38400:
- return B38400;
- case 57600:
- return B57600;
- case 115200:
- return B115200;
- case 230400:
- return B230400;
- case 460800:
- return B460800;
- case 500000:
- return B500000;
- case 576000:
- return B576000;
- case 921600:
- return B921600;
- case 1000000:
- return B1000000;
- case 1152000:
- return B1152000;
- case 1500000:
- return B1500000;
- case 2000000:
- return B2000000;
- case 2500000:
- return B2500000;
- case 3000000:
- return B3000000;
- case 3500000:
- return B3500000;
- case 4000000:
- return B4000000;
- default:
- // if we are here, then an unsupported baudrate was selected.
- // Report it via syslog and return B9600, a common default.
- syslog(LOG_ERR, "uart: unsupported baud rate, defaulting to 9600.");
- return B9600;
- }
-}
-
-static mraa_uart_context
-mraa_uart_init_internal(mraa_adv_func_t* func_table)
-{
- mraa_uart_context dev = (mraa_uart_context) calloc(1, sizeof(struct _uart));
- if (dev == NULL) {
- syslog(LOG_CRIT, "uart: Failed to allocate memory for context");
- return NULL;
- }
- dev->index = -1;
- dev->fd = -1;
- dev->advance_func = func_table;
-
- return dev;
-}
-
-mraa_uart_context
-mraa_uart_init(int index)
-{
- if (plat == NULL) {
- syslog(LOG_ERR, "uart: platform not initialised");
- return NULL;
- }
-
- if (mraa_is_sub_platform_id(index)) {
- syslog(LOG_NOTICE, "uart: Using sub platform is not supported");
- return NULL;
- }
-
- if (plat->adv_func->uart_init_pre != NULL) {
- if (plat->adv_func->uart_init_pre(index) != MRAA_SUCCESS) {
- syslog(LOG_ERR, "uart: failure in pre-init platform hook");
- return NULL;
- }
- }
-
- if (plat->uart_dev_count == 0) {
- syslog(LOG_ERR, "uart: platform has no UARTs defined");
- return NULL;
- }
-
- if (plat->uart_dev_count <= index) {
- syslog(LOG_ERR, "uart: platform has only %i", plat->uart_dev_count);
- return NULL;
- }
-
- if (!plat->no_bus_mux) {
- int pos = plat->uart_dev[index].rx;
- if (pos >= 0) {
- if (plat->pins[pos].uart.mux_total > 0) {
- if (mraa_setup_mux_mapped(plat->pins[pos].uart) != MRAA_SUCCESS) {
- syslog(LOG_ERR, "uart: failed to setup muxes for RX pin");
- return NULL;
- }
- }
- }
-
- pos = plat->uart_dev[index].tx;
- if (pos >= 0) {
- if (plat->pins[pos].uart.mux_total > 0) {
- if (mraa_setup_mux_mapped(plat->pins[pos].uart) != MRAA_SUCCESS) {
- syslog(LOG_ERR, "uart: failed to setup muxes for TX pin");
- return NULL;
- }
- }
- }
- }
-
- mraa_uart_context dev = mraa_uart_init_raw((char*)plat->uart_dev[index].device_path);
- if (dev == NULL) {
- return NULL;
- }
- dev->index = index; //Set the board Index.
-
- if (IS_FUNC_DEFINED(dev, uart_init_post)) {
- mraa_result_t ret = dev->advance_func->uart_init_post(dev);
- if (ret != MRAA_SUCCESS) {
- free(dev);
- return NULL;
- }
- }
-
- return dev;
-}
-
-mraa_uart_context
-mraa_uart_init_raw(const char* path)
-{
- mraa_uart_context dev = mraa_uart_init_internal(plat == NULL ? NULL : plat->adv_func);
- if (dev == NULL) {
- syslog(LOG_ERR, "uart: Failed to allocate memory for context");
- return NULL;
- }
- dev->path = path;
-
- if (!dev->path) {
- syslog(LOG_ERR, "uart: device path undefined, open failed");
- free(dev);
- return NULL;
- }
-
- // now open the device
- if ((dev->fd = open(dev->path, O_RDWR)) == -1) {
- syslog(LOG_ERR, "uart: open() failed");
- free(dev);
- return NULL;
- }
-
- // now setup the tty and the selected baud rate
- struct termios termio;
-
- // get current modes
- if (tcgetattr(dev->fd, &termio)) {
- syslog(LOG_ERR, "uart: tcgetattr() failed");
- close(dev->fd);
- free(dev);
- return NULL;
- }
-
- // setup for a 'raw' mode. 8N1, no echo or special character
- // handling, such as flow control or line editing semantics.
- // cfmakeraw is not POSIX!
- cfmakeraw(&termio);
- if (tcsetattr(dev->fd, TCSAFLUSH, &termio) < 0) {
- syslog(LOG_ERR, "uart: tcsetattr() failed after cfmakeraw()");
- close(dev->fd);
- free(dev);
- return NULL;
- }
-
- if (mraa_uart_set_baudrate(dev, 9600) != MRAA_SUCCESS) {
- close(dev->fd);
- free(dev);
- return NULL;
- }
-
- return dev;
-}
-
-mraa_result_t
-mraa_uart_stop(mraa_uart_context dev)
-{
- if (!dev) {
- syslog(LOG_ERR, "uart: stop: context is NULL");
- return MRAA_ERROR_INVALID_HANDLE;
- }
-
- // just close the device and reset our fd.
- if (dev->fd >= 0) {
- close(dev->fd);
- }
-
- free(dev);
-
- return MRAA_SUCCESS;
-}
-
-mraa_result_t
-mraa_uart_flush(mraa_uart_context dev)
-{
- if (!dev) {
- syslog(LOG_ERR, "uart: stop: context is NULL");
- return MRAA_ERROR_INVALID_HANDLE;
- }
-
- if (tcdrain(dev->fd) == -1) {
- return MRAA_ERROR_FEATURE_NOT_SUPPORTED;
- }
-
- return MRAA_SUCCESS;
-}
-
-mraa_result_t
-mraa_uart_set_baudrate(mraa_uart_context dev, unsigned int baud)
-{
- if (!dev) {
- syslog(LOG_ERR, "uart: stop: context is NULL");
- return MRAA_ERROR_INVALID_HANDLE;
- }
-
- struct termios termio;
- if (tcgetattr(dev->fd, &termio)) {
- syslog(LOG_ERR, "uart: tcgetattr() failed");
- return MRAA_ERROR_INVALID_HANDLE;
- }
-
- // set our baud rates
- speed_t speed = uint2speed(baud);
- cfsetispeed(&termio, speed);
- cfsetospeed(&termio, speed);
-
- // make it so
- if (tcsetattr(dev->fd, TCSAFLUSH, &termio) < 0) {
- syslog(LOG_ERR, "uart: tcsetattr() failed");
- return MRAA_ERROR_FEATURE_NOT_SUPPORTED;
- }
- return MRAA_SUCCESS;
-}
-
-mraa_result_t
-mraa_uart_set_mode(mraa_uart_context dev, int bytesize, mraa_uart_parity_t parity, int stopbits)
-{
- if (!dev) {
- syslog(LOG_ERR, "uart: stop: context is NULL");
- return MRAA_ERROR_INVALID_HANDLE;
- }
-
- struct termios termio;
- if (tcgetattr(dev->fd, &termio)) {
- syslog(LOG_ERR, "uart: tcgetattr() failed");
- return MRAA_ERROR_INVALID_HANDLE;
- }
-
- termio.c_cflag &= ~CSIZE;
- switch (bytesize) {
- case 8:
- termio.c_cflag |= CS8;
- break;
- case 7:
- termio.c_cflag |= CS7;
- break;
- case 6:
- termio.c_cflag |= CS6;
- break;
- case 5:
- termio.c_cflag |= CS5;
- break;
- default:
- termio.c_cflag |= CS8;
- break;
- }
-
- // POSIX & linux doesn't support 1.5 and I've got bigger fish to fry
- switch (stopbits) {
- case 1:
- termio.c_cflag &= ~CSTOPB;
- break;
- case 2:
- termio.c_cflag |= CSTOPB;
- default:
- break;
- }
-
- switch (parity) {
- case MRAA_UART_PARITY_NONE:
- termio.c_cflag &= ~(PARENB | PARODD);
- break;
- case MRAA_UART_PARITY_EVEN:
- termio.c_cflag |= PARENB;
- termio.c_cflag &= ~PARODD;
- break;
- case MRAA_UART_PARITY_ODD:
- termio.c_cflag |= PARENB | PARODD;
- break;
- case MRAA_UART_PARITY_MARK: // not POSIX
- termio.c_cflag |= PARENB | CMSPAR | PARODD;
- break;
- case MRAA_UART_PARITY_SPACE: // not POSIX
- termio.c_cflag |= PARENB | CMSPAR;
- termio.c_cflag &= ~PARODD;
- break;
- }
-
- if (tcsetattr(dev->fd, TCSAFLUSH, &termio) < 0) {
- syslog(LOG_ERR, "uart: tcsetattr() failed");
- return MRAA_ERROR_FEATURE_NOT_SUPPORTED;
- }
-
- return MRAA_SUCCESS;
-}
-
-mraa_result_t
-mraa_uart_set_flowcontrol(mraa_uart_context dev, mraa_boolean_t xonxoff, mraa_boolean_t rtscts)
-{
- if (!dev) {
- syslog(LOG_ERR, "uart: stop: context is NULL");
- return MRAA_ERROR_INVALID_HANDLE;
- }
-
- // hardware flow control
- int action = TCIOFF;
- if (xonxoff) {
- action = TCION;
- }
- if (tcflow(dev->fd, action)) {
- return MRAA_ERROR_FEATURE_NOT_SUPPORTED;
- }
-
- // rtscts
- struct termios termio;
-
- // get current modes
- if (tcgetattr(dev->fd, &termio)) {
- syslog(LOG_ERR, "uart: tcgetattr() failed");
- return MRAA_ERROR_INVALID_HANDLE;
- }
-
- if (rtscts) {
- termio.c_cflag |= CRTSCTS;
- } else {
- termio.c_cflag &= ~CRTSCTS;
- }
-
- if (tcsetattr(dev->fd, TCSAFLUSH, &termio) < 0) {
- syslog(LOG_ERR, "uart: tcsetattr() failed");
- return MRAA_ERROR_FEATURE_NOT_SUPPORTED;
- }
-
- return MRAA_SUCCESS;
-}
-
-mraa_result_t
-mraa_uart_set_timeout(mraa_uart_context dev, int read, int write, int interchar)
-{
- if (!dev) {
- syslog(LOG_ERR, "uart: stop: context is NULL");
- return MRAA_ERROR_INVALID_HANDLE;
- }
-
- struct termios termio;
- // get current modes
- if (tcgetattr(dev->fd, &termio)) {
- syslog(LOG_ERR, "uart: tcgetattr() failed");
- return MRAA_ERROR_FEATURE_NOT_SUPPORTED;
- }
- if (read > 0) {
- read = read / 100;
- if (read == 0)
- read = 1;
- }
- termio.c_lflag &= ~ICANON; /* Set non-canonical mode */
- termio.c_cc[VTIME] = read; /* Set timeout in tenth seconds */
- if (tcsetattr(dev->fd, TCSANOW, &termio) < 0) {
- syslog(LOG_ERR, "uart: tcsetattr() failed");
- return MRAA_ERROR_FEATURE_NOT_SUPPORTED;
- }
-
- return MRAA_SUCCESS;
-}
-
-const char*
-mraa_uart_get_dev_path(mraa_uart_context dev)
-{
- if (!dev) {
- syslog(LOG_ERR, "uart: get_device_path failed, context is NULL");
- return NULL;
- }
- if (dev->path == NULL) {
- syslog(LOG_ERR, "uart: device path undefined");
- return NULL;
- }
-
- return dev->path;
-}
-
-int
-mraa_uart_read(mraa_uart_context dev, char* buf, size_t len)
-{
- if (!dev) {
- syslog(LOG_ERR, "uart: read: context is NULL");
- return MRAA_ERROR_INVALID_HANDLE;
- }
-
- if (dev->fd < 0) {
- syslog(LOG_ERR, "uart: port is not open");
- return MRAA_ERROR_INVALID_RESOURCE;
- }
-
- return read(dev->fd, buf, len);
-}
-
-int
-mraa_uart_write(mraa_uart_context dev, const char* buf, size_t len)
-{
- if (!dev) {
- syslog(LOG_ERR, "uart: write: context is NULL");
- return MRAA_ERROR_INVALID_HANDLE;
- }
-
- if (dev->fd < 0) {
- syslog(LOG_ERR, "uart: port is not open");
- return MRAA_ERROR_INVALID_RESOURCE;
- }
-
- return write(dev->fd, buf, len);
-}
-
-mraa_boolean_t
-mraa_uart_data_available(mraa_uart_context dev, unsigned int millis)
-{
- if (!dev) {
- syslog(LOG_ERR, "uart: data_available: write context is NULL");
- return 0;
- }
-
- if (dev->fd < 0) {
- syslog(LOG_ERR, "uart: port is not open");
- return 0;
- }
-
- struct timeval timeout;
-
- if (millis == 0) {
- // no waiting
- timeout.tv_sec = 0;
- timeout.tv_usec = 0;
- } else {
- timeout.tv_sec = millis / 1000;
- timeout.tv_usec = (millis % 1000) * 1000;
- }
-
- fd_set readfds;
-
- FD_ZERO(&readfds);
- FD_SET(dev->fd, &readfds);
-
- if (select(dev->fd + 1, &readfds, NULL, NULL, &timeout) > 0) {
- return 1; // data is ready
- } else {
- return 0;
- }
-}
-
-
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