From: Nathael Pajani <nathael.pajani@ed3l.fr>
Date: Tue, 10 Nov 2015 20:36:09 +0000 (+0100)
Subject: Commit of the simple ADC Rx test, used for audio sampling.
X-Git-Url: http://git.techno-innov.fr/?a=commitdiff_plain;h=aa1c0339b4bd2a7cc347fc9f483cca35d74355d9;p=soft%2Flpc122x%2Fexamples

Commit of the simple ADC Rx test, used for audio sampling.
---

diff --git a/adc/adc_rx/Makefile b/adc/adc_rx/Makefile
new file mode 100644
index 0000000..42a7b1d
--- /dev/null
+++ b/adc/adc_rx/Makefile
@@ -0,0 +1,32 @@
+#CROSS_COMPILE ?= arm-linux-gnueabihf-
+CC = $(CROSS_COMPILE)gcc
+
+CFLAGS = -Wall -O2 -Wextra
+
+EXEC = adc_rx
+
+all: $(EXEC)
+
+
+OBJDIR = objs
+SRC = $(shell find . -name \*.c)
+OBJS = ${SRC:%.c=${OBJDIR}/%.o}
+INCLUDES = includes/
+
+${OBJDIR}/%.o: %.c
+	@mkdir -p $(dir $@)
+	@echo "-- compiling" $<
+	@$(CC) -MMD -MP -MF ${OBJDIR}/$*.d $(CFLAGS) $< -c -o $@ -I$(INCLUDES)
+
+$(EXEC): $(OBJS)
+	@echo "Linking $@ ..."
+	@$(CC) $(LDFLAGS) -o $@ $(OBJS)
+	@echo Done.
+
+
+clean:
+	find ${OBJDIR} -name "*.o" -exec rm {} \;
+	find ${OBJDIR} -name "*.d" -exec rm {} \;
+
+mrproper: clean
+	rm -f $(EXEC)
diff --git a/adc/adc_rx/main.c b/adc/adc_rx/main.c
new file mode 100644
index 0000000..43a3c2c
--- /dev/null
+++ b/adc/adc_rx/main.c
@@ -0,0 +1,99 @@
+/****************************************************************************
+ *  ADC Rx test
+ *   main.c
+ *
+ * Copyright 2013-2014 Nathael Pajani <nathael.pajani@ed3l.fr>
+ *
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ ****************************************************************************/
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <termios.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/select.h>
+#include <sys/time.h>
+
+
+
+#define SERIAL_BAUD  B1152000
+
+int serial_setup(char* name)
+{
+	struct termios tio;
+	int fd = -1;
+
+	/* Open serial port */
+	fd = open(name, O_RDWR | O_NONBLOCK);
+	if (fd < 0) {
+		perror("Unable to open communication with companion chip");
+		return -1;
+	}
+	/* Setup serial port */
+	memset(&tio, 0, sizeof(tio));
+	tio.c_cflag = CS8 | CREAD | CLOCAL;	/* 8n1, see termios.h for more information */
+	tio.c_cc[VMIN] = 1;
+	tio.c_cc[VTIME] = 5;
+	cfsetospeed(&tio, SERIAL_BAUD);
+	cfsetispeed(&tio, SERIAL_BAUD);
+	tcsetattr(fd, TCSANOW, &tio);
+
+	return fd;
+}
+
+
+
+int main(int argc, char* argv[])
+{
+	int tty_fd = -1;
+	int out_fd = 1;
+
+	/* Need Serial port and destination file as parameter */
+	if (argc != 3) {
+		printf("Need tty device number and destination file\n");
+		printf("Please start with %s /dev/ttyUSB0 raw_audio (for example)\n", argv[0]);
+		return -1;
+	}
+
+	/* Open tty */
+	tty_fd = serial_setup(argv[1]);
+	if (tty_fd < 0) {
+		printf("Unable to open specified serial port %s\n", argv[1]);
+		return -4;
+	}
+
+	/* And never stop getting data ! */
+	while (1) {
+		char buf[BUF_SIZE];
+		int ret = 0, len = 0;
+
+		memset(buf, 0, BUF_SIZE);
+		len = read(tty_fd, buf, BUF_SIZE);
+
+	} /* End of infinite loop */
+
+	close(tty_fd);
+	close(out_fd);
+	return 0;
+}
+
+