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tests/spi: update running hints in usage for raspberry pi 3

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This commit is contained in:
Vanya A. Sergeev
2019-08-18 18:05:59 -05:00
parent ab196c2bb8
commit 06d52157ab
1 changed files with 7 additions and 6 deletions
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tests/test_spi.c
+7 -6
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@@ -177,12 +177,13 @@ int main(int argc, char *argv[]) {
fprintf(stderr, "[1/4] Arguments test: No requirements.\n");
fprintf(stderr, "[2/4] Open/close test: SPI device should be real.\n");
fprintf(stderr, "[3/4] Loopback test: SPI MISO and MOSI should be connected with a wire.\n");
fprintf(stderr, "[4/4] Interactive test: SPI MOSI, CLK, CS should be observed with a logic analyzer.\n\n");
fprintf(stderr, "Hint: for BeagleBone Black, export SPI0 to /dev/spidev1.* with:\n");
fprintf(stderr, " echo BB-SPIDEV0 > /sys/devices/bone_capemgr.9/slots\n");
fprintf(stderr, "to enable SPI0 (CS=P9.17, MOSI=P9.21, MISO=P9.18, CLK=P9.22).\n");
fprintf(stderr, "Connect a wire between MOSI and MISO, then run this test:\n");
fprintf(stderr, " %s /dev/spidev1.0\n\n", argv[0]);
fprintf(stderr, "[4/4] Interactive test: SPI MOSI, CLK, CS should be observed with an oscilloscope or logic analyzer.\n\n");
fprintf(stderr, "Hint: for Raspberry Pi 3, enable SPI0 with:\n");
fprintf(stderr, " $ echo \"dtparam=spi=on\" | sudo tee -a /boot/config.txt\n");
fprintf(stderr, " $ sudo reboot\n");
fprintf(stderr, "Use pins SPI0 MOSI (header pin 19), SPI0 MISO (header pin 21), SPI0 SCLK (header pin 23),\n");
fprintf(stderr, "connect a loopback between MOSI and MISO, and run this test with:\n");
fprintf(stderr, " %s /dev/spidev0.0\n\n", argv[0]);
exit(1);
}