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lpc176x: Convert i2c code to use standard i2ccmds.c

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Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor
2018-11-14 10:23:56 -05:00
parent f973886dac
commit f3c4deb1ab
4 changed files with 38 additions and 13 deletions
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28
src/lpc176x/i2c.c
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@@ -7,6 +7,7 @@
#include "LPC17xx.h" // LPC_I2C1
#include "board/misc.h" // timer_is_before
#include "command.h" // DECL_COMMAND
#include "gpio.h" // i2c_setup
#include "internal.h" // gpio_peripheral
#include "sched.h" // sched_shutdown
@@ -37,6 +38,15 @@ i2c_init(void)
LPC_I2C1->I2CONSET = IF_ENA;
}
struct i2c_config
i2c_setup(uint32_t bus, uint32_t rate, uint8_t addr)
{
if (bus)
shutdown("Unsupported i2c bus");
i2c_init();
return (struct i2c_config){ .addr=addr };
}
static void
i2c_wait(uint32_t bit, uint32_t timeout)
{
@@ -78,23 +88,21 @@ i2c_stop(uint32_t timeout)
i2c_wait(IF_STOP, timeout);
}
static void
i2c_send(uint8_t *data, int data_len)
void
i2c_write(struct i2c_config config, uint8_t write_len, uint8_t *write)
{
i2c_init();
uint32_t timeout = timer_read_time() + timer_from_us(5000);
i2c_start(timeout);
while (data_len--)
i2c_send_byte(*data++, timeout);
i2c_send_byte(config.addr, timeout);
while (write_len--)
i2c_send_byte(*write++, timeout);
i2c_stop(timeout);
}
// This provides just enough functionality to program an MCP4451 chip
void
command_i2c_send(uint32_t *args)
i2c_read(struct i2c_config config, uint8_t reg_len, uint8_t *reg
, uint8_t read_len, uint8_t *read)
{
uint8_t data_len = args[0], *data = (void*)(size_t)args[1];
i2c_send(data, data_len);
shutdown("i2c_read not supported on lpc176x");
}
DECL_COMMAND(command_i2c_send, "i2c_send data=%*s");