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tests/periph_spi: Lock bus for exclusive access when communicating.

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This commit is contained in:
Joakim Gebart 2015-01-16 16:05:04 +01:00
parent c457cd954d
commit dfb0d58cfb
1 changed files with 6 additions and 0 deletions
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6
tests/periph_spi/main.c
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@ -178,7 +178,9 @@ void cmd_init_master(int argc, char **argv)
if (parse_spi_dev(argc, argv) < 0) { if (parse_spi_dev(argc, argv) < 0) {
return; return;
} }
spi_acquire(spi_dev);
res = spi_init_master(spi_dev, spi_mode, spi_speed); res = spi_init_master(spi_dev, spi_mode, spi_speed);
spi_release(spi_dev);
if (res < 0) { if (res < 0) {
printf("spi_init_master: error initializing SPI_%i device (code %i)\n", spi_dev, res); printf("spi_init_master: error initializing SPI_%i device (code %i)\n", spi_dev, res);
return; return;
@ -202,7 +204,9 @@ void cmd_init_slave(int argc, char **argv)
if (parse_spi_dev(argc, argv) < 0) { if (parse_spi_dev(argc, argv) < 0) {
return; return;
} }
spi_acquire(spi_dev);
res = spi_init_slave(spi_dev, spi_mode, slave_on_data); res = spi_init_slave(spi_dev, spi_mode, slave_on_data);
spi_release(spi_dev);
if (res < 0) { if (res < 0) {
printf("spi_init_slave: error initializing SPI_%i device (code: %i)\n", spi_dev, res); printf("spi_init_slave: error initializing SPI_%i device (code: %i)\n", spi_dev, res);
return; return;
@ -236,9 +240,11 @@ void cmd_transfer(int argc, char **argv)
} }
/* do the actual data transfer */ /* do the actual data transfer */
spi_acquire(spi_dev);
gpio_clear(spi_cs); gpio_clear(spi_cs);
res = spi_transfer_bytes(spi_dev, hello, buffer, strlen(hello)); res = spi_transfer_bytes(spi_dev, hello, buffer, strlen(hello));
gpio_set(spi_cs); gpio_set(spi_cs);
spi_release(spi_dev);
/* look at the results */ /* look at the results */
if (res < 0) { if (res < 0) {