From ea4db73328e865fd658b573da256ca0004c69c61 Mon Sep 17 00:00:00 2001 From: Keith Packard Date: Sun, 26 Aug 2012 09:45:03 -0700 Subject: [PATCH] altos: Add debug command for 74hc597 driver This dumps the current state of the 74hc597 chip. Note that this shows that the 74hc597 driver doesn't work, and that the circuit used in telefire v0.1 can't work. Signed-off-by: Keith Packard --- src/drivers/ao_74hc497.c | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-) diff --git a/src/drivers/ao_74hc497.c b/src/drivers/ao_74hc497.c index 93c544c3..4c13ee71 100644 --- a/src/drivers/ao_74hc497.c +++ b/src/drivers/ao_74hc497.c @@ -28,13 +28,28 @@ ao_74hc497_read(void) { static __xdata state; ao_spi_get_bit(AO_74HC497_CS_PORT, AO_74HC497_CS_PIN, AO_74HC497_CS, AO_74HC497_SPI_BUS, AO_SPI_SPEED_FAST); - ao_spi_send(&state, 1, AO_74HC497_SPI_BUS); + ao_spi_recv(&state, 1, AO_74HC497_SPI_BUS); ao_spi_put_bit(AO_74HC497_CS_PORT, AO_74HC497_CS_PIN, AO_74HC497_CS, AO_74HC497_SPI_BUS); return state; } +static void +ao_74hc497_cmd(void) +{ + uint8_t v; + + v = ao_74hc497_read(); + printf ("Switches: 0x%02x\n", v); +} + +static const struct ao_cmds ao_74hc497_cmds[] = { + { ao_74hc497_cmd, "L\0Show 74hc497" }, + { 0, NULL } +}; + void ao_74hc497_init(void) { ao_enable_output(AO_74HC497_CS_PORT, AO_74HC497_CS_PIN, AO_74HC497_CS, 1); + ao_cmd_register(&ao_74hc497_cmds[0]); } -- 2.30.2