From 7aec98c57df5a04e482c2e1909c52f83e74513f1 Mon Sep 17 00:00:00 2001
From: PeterKietzmann <peter.kietzmann@haw-hamburg.de>
Date: Fri, 17 Oct 2014 10:09:25 +0200
Subject: [PATCH] Added a function for the slave to print received data.
---
tests/periph_spi/main.c | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/tests/periph_spi/main.c b/tests/periph_spi/main.c
index 65c2edda4a..ce59d0263a 100644
--- a/tests/periph_spi/main.c
+++ b/tests/periph_spi/main.c
@@ -44,6 +44,8 @@ static int spi_speed = -1;
static int spi_master = -1; /* 0 for slave, 1 for master, -1 for not initialized */
static char buffer[256]; /* temporary buffer */
+static char rx_buffer[256]; /* global receive buffer */
+static int rx_counter = 0;
static volatile int state;
static char* mem = "Hello Master! abcdefghijklmnopqrstuvwxyz 0123456789 ABCDEFGHIJKLMNOPQRSTUVWXYZ";
@@ -140,6 +142,12 @@ void slave_on_cs(void *arg)
char slave_on_data(char data)
{
+ rx_buffer[rx_counter] = data;
+ rx_counter++;
+ if (rx_counter >= 256) {
+ rx_counter = 0;
+ }
+
switch (rw) {
case READ:
return mem[state++];
@@ -239,6 +247,19 @@ void cmd_transfer(int argc, char **argv)
}
}
+void cmd_print(int argc, char **argv)
+{
+ if (spi_master != 0) {
+ puts("error: node is not initialized as slave");
+ }
+ else {
+ printf("Received %i bytes:\n", rx_counter);
+ print_bytes("MOSI", rx_buffer, rx_counter);
+ }
+ rx_counter = 0;
+ memset(&rx_buffer, 0, 256);
+}
+
int shell_getchar(void)
{
return (int)getchar();
@@ -253,6 +274,7 @@ static const shell_command_t shell_commands[] = {
{ "init_master", "Initialize node as SPI master", cmd_init_master },
{ "init_slave", "Initialize node as SPI slave", cmd_init_slave },
{ "send", "Transfer string to slave (only in master mode)", cmd_transfer },
+ { "print_rx", "Print the received string (only in slave mode)", cmd_print },
{ NULL, NULL, NULL }
};
--
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