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linux: Convert SPI to use enumerations 

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2019-04-01 00:25:56 -04:00
parent 3e71a57f67
commit f8bde6b1ef
2 changed files with 11 additions and 2 deletions
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2
klippy/extras/replicape.py
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@ -7,7 +7,7 @@ import logging
import pins, mcu, bus
REPLICAPE_MAX_CURRENT = 3.84
REPLICAPE_SHIFT_REGISTER_BUS = 0x0101
REPLICAPE_SHIFT_REGISTER_BUS = "spidev1.1"
REPLICAPE_PCA9685_BUS = 2
REPLICAPE_PCA9685_ADDRESS = 0x70
REPLICAPE_PCA9685_CYCLE_TIME = .001

11
src/linux/spidev.c
View File

@ -15,6 +15,15 @@
#include "internal.h" // report_errno
#include "sched.h" // shutdown
#define SPIBUS(chip, pin) (((chip)<<8) + (pin))
#define SPIBUS_TO_BUS(spi_bus) ((spi_bus) >> 8)
#define SPIBUS_TO_DEV(spi_bus) ((spi_bus) & 0xff)
DECL_ENUMERATION_RANGE("spi_bus", "spidev0.0", SPIBUS(0, 0), 16);
DECL_ENUMERATION_RANGE("spi_bus", "spidev1.0", SPIBUS(1, 0), 16);
DECL_ENUMERATION_RANGE("spi_bus", "spidev2.0", SPIBUS(2, 0), 16);
DECL_ENUMERATION_RANGE("spi_bus", "spidev3.0", SPIBUS(3, 0), 16);
struct spi_s {
uint32_t bus, dev;
int fd;
@ -54,7 +63,7 @@ spi_open(uint32_t bus, uint32_t dev)
struct spi_config
spi_setup(uint32_t bus, uint8_t mode, uint32_t rate)
{
int bus_id = (bus >> 8) & 0xff, dev_id = bus & 0xff;
int bus_id = SPIBUS_TO_BUS(bus), dev_id = SPIBUS_TO_DEV(bus);
int fd = spi_open(bus_id, dev_id);
int ret = ioctl(fd, SPI_IOC_WR_MAX_SPEED_HZ, &rate);
if (ret < 0) {