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RFFC5071: Refactor a bunch.

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This commit is contained in:
Jared Boone
2014-11-08 18:00:20 -08:00
parent 55ed2c1aff
commit e1d1274523
3 changed files with 109 additions and 139 deletions
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15
firmware/common/rffc5071.c
View File

@ -120,6 +120,21 @@ void rffc5071_setup(rffc5071_driver_t* const drv)
rffc5071_regs_commit(drv);
}
static uint16_t rffc5071_spi_read(rffc5071_driver_t* const drv, uint8_t r) {
(void)drv;
uint16_t data[] = { 0x80 | (r & 0x7f), 0xffff };
rffc5071_spi_transfer(drv, data, 2);
return data[1];
}
static void rffc5071_spi_write(rffc5071_driver_t* const drv, uint8_t r, uint16_t v) {
(void)drv;
uint16_t data[] = { 0x00 | (r & 0x7f), v };
rffc5071_spi_transfer(drv, data, 2);
}
uint16_t rffc5071_reg_read(rffc5071_driver_t* const drv, uint8_t r)
{
/* Readback register is not cached. */

230
firmware/common/rffc5071_drv.c
View File

@ -25,35 +25,98 @@
#include <libopencm3/lpc43xx/gpio.h>
#include "hackrf_core.h"
void rffc5071_pin_config(rffc5071_driver_t* const drv) {
(void)drv;
/* Configure GPIO pins. */
scu_pinmux(SCU_MIXER_ENX, SCU_GPIO_FAST);
static void rffc5071_target_select() {
gpio_clear(PORT_MIXER_ENX, PIN_MIXER_ENX);
}
static void rffc5071_target_unselect() {
gpio_set(PORT_MIXER_ENX, PIN_MIXER_ENX);
}
static void rffc5071_spi_direction_out() {
GPIO_DIR(PORT_MIXER_SDATA) |= PIN_MIXER_SDATA;
}
static void rffc5071_spi_direction_in() {
GPIO_DIR(PORT_MIXER_SDATA) &= ~PIN_MIXER_SDATA;
}
static void rffc5071_spi_data_out(const bool bit) {
if (bit)
gpio_set(PORT_MIXER_SDATA, PIN_MIXER_SDATA);
else
gpio_clear(PORT_MIXER_SDATA, PIN_MIXER_SDATA);
}
static bool rffc5071_spi_data_in() {
return MIXER_SDATA_STATE;
}
static void rffc5071_spi_init() {
scu_pinmux(SCU_MIXER_SCLK, SCU_GPIO_FAST | SCU_CONF_FUNCTION4);
scu_pinmux(SCU_MIXER_SDATA, SCU_GPIO_FAST);
GPIO_DIR(PORT_MIXER_SCLK) |= PIN_MIXER_SCLK;
rffc5071_spi_direction_out();
gpio_clear(PORT_MIXER_SCLK, PIN_MIXER_SCLK);
gpio_clear(PORT_MIXER_SDATA, PIN_MIXER_SDATA);
}
static void rffc5071_target_init() {
/* Configure GPIO pins. */
scu_pinmux(SCU_MIXER_ENX, SCU_GPIO_FAST);
scu_pinmux(SCU_MIXER_RESETX, SCU_GPIO_FAST);
/* Set GPIO pins as outputs. */
GPIO_DIR(PORT_MIXER_ENX) |= PIN_MIXER_ENX;
GPIO_DIR(PORT_MIXER_SCLK) |= PIN_MIXER_SCLK;
GPIO_DIR(PORT_MIXER_SDATA) |= PIN_MIXER_SDATA;
GPIO_DIR(PORT_MIXER_RESETX) |= PIN_MIXER_RESETX;
/* set to known state */
gpio_set(PORT_MIXER_ENX, PIN_MIXER_ENX); /* active low */
gpio_clear(PORT_MIXER_SCLK, PIN_MIXER_SCLK);
gpio_clear(PORT_MIXER_SDATA, PIN_MIXER_SDATA);
rffc5071_target_unselect();
gpio_set(PORT_MIXER_RESETX, PIN_MIXER_RESETX); /* active low */
}
static void serial_delay(void)
{
uint32_t i;
void rffc5071_pin_config(rffc5071_driver_t* const drv) {
(void)drv;
rffc5071_spi_init();
rffc5071_target_init();
}
static void rffc5071_spi_serial_delay(void) {
volatile uint32_t i;
for (i = 0; i < 2; i++)
__asm__("nop");
}
static void rffc5071_spi_sck() {
rffc5071_spi_serial_delay();
gpio_set(PORT_MIXER_SCLK, PIN_MIXER_SCLK);
rffc5071_spi_serial_delay();
gpio_clear(PORT_MIXER_SCLK, PIN_MIXER_SCLK);
}
static uint32_t rffc5071_spi_exchange_bit(const uint32_t bit) {
rffc5071_spi_data_out(bit);
rffc5071_spi_sck();
return rffc5071_spi_data_in() ? 1 : 0;
}
static uint32_t rffc5071_spi_exchange_word(const uint32_t data, const size_t count) {
size_t bits = count;
const uint32_t msb = 1UL << (count - 1);
uint32_t t = data;
while (bits--) {
t = (t << 1) | rffc5071_spi_exchange_bit(t & msb);
}
return t & ((1UL << count) - 1);
}
/* SPI register read.
*
* Send 9 bits:
@ -62,91 +125,6 @@ static void serial_delay(void)
* next 7 bits are register address.
* Then receive 16 bits (register value).
*/
uint16_t rffc5071_spi_read(rffc5071_driver_t* const drv, uint8_t r) {
(void)drv;
int bits = 9;
int msb = 1 << (bits -1);
uint32_t data = 0x80 | (r & 0x7f);
/* make sure everything is starting in the correct state */
gpio_set(PORT_MIXER_ENX, PIN_MIXER_ENX);
gpio_clear(PORT_MIXER_SCLK, PIN_MIXER_SCLK);
gpio_clear(PORT_MIXER_SDATA, PIN_MIXER_SDATA);
/*
* The device requires two clocks while ENX is high before a serial
* transaction. This is not clearly documented.
*/
serial_delay();
gpio_set(PORT_MIXER_SCLK, PIN_MIXER_SCLK);
serial_delay();
gpio_clear(PORT_MIXER_SCLK, PIN_MIXER_SCLK);
serial_delay();
gpio_set(PORT_MIXER_SCLK, PIN_MIXER_SCLK);
serial_delay();
gpio_clear(PORT_MIXER_SCLK, PIN_MIXER_SCLK);
/* start transaction by bringing ENX low */
gpio_clear(PORT_MIXER_ENX, PIN_MIXER_ENX);
while (bits--) {
if (data & msb)
gpio_set(PORT_MIXER_SDATA, PIN_MIXER_SDATA);
else
gpio_clear(PORT_MIXER_SDATA, PIN_MIXER_SDATA);
data <<= 1;
serial_delay();
gpio_set(PORT_MIXER_SCLK, PIN_MIXER_SCLK);
serial_delay();
gpio_clear(PORT_MIXER_SCLK, PIN_MIXER_SCLK);
}
serial_delay();
gpio_set(PORT_MIXER_SCLK, PIN_MIXER_SCLK);
serial_delay();
gpio_clear(PORT_MIXER_SCLK, PIN_MIXER_SCLK);
bits = 16;
data = 0;
/* set SDATA line as input */
GPIO_DIR(PORT_MIXER_SDATA) &= ~PIN_MIXER_SDATA;
while (bits--) {
data <<= 1;
serial_delay();
gpio_set(PORT_MIXER_SCLK, PIN_MIXER_SCLK);
serial_delay();
gpio_clear(PORT_MIXER_SCLK, PIN_MIXER_SCLK);
if (MIXER_SDATA_STATE)
data |= 1;
}
/* set SDATA line as output */
GPIO_DIR(PORT_MIXER_SDATA) |= PIN_MIXER_SDATA;
serial_delay();
gpio_set(PORT_MIXER_ENX, PIN_MIXER_ENX);
/*
* The device requires a clock while ENX is high after a serial
* transaction. This is not clearly documented.
*/
gpio_set(PORT_MIXER_SCLK, PIN_MIXER_SCLK);
serial_delay();
gpio_clear(PORT_MIXER_SCLK, PIN_MIXER_SCLK);
return data;
}
/* SPI register write
*
* Send 25 bits:
@ -155,60 +133,38 @@ uint16_t rffc5071_spi_read(rffc5071_driver_t* const drv, uint8_t r) {
* next 7 bits are register address,
* next 16 bits are register value.
*/
void rffc5071_spi_write(rffc5071_driver_t* const drv, uint8_t r, uint16_t v) {
void rffc5071_spi_transfer(rffc5071_driver_t* const drv, uint16_t* const data, const size_t count) {
(void)drv;
int bits = 25;
int msb = 1 << (bits -1);
uint32_t data = ((r & 0x7f) << 16) | v;
/* make sure everything is starting in the correct state */
gpio_set(PORT_MIXER_ENX, PIN_MIXER_ENX);
gpio_clear(PORT_MIXER_SCLK, PIN_MIXER_SCLK);
gpio_clear(PORT_MIXER_SDATA, PIN_MIXER_SDATA);
if( count != 2 ) {
return;
}
const bool direction_read = (data[0] >> 7) & 1;
/*
* The device requires two clocks while ENX is high before a serial
* transaction. This is not clearly documented.
*/
serial_delay();
gpio_set(PORT_MIXER_SCLK, PIN_MIXER_SCLK);
rffc5071_spi_sck();
rffc5071_spi_sck();
serial_delay();
gpio_clear(PORT_MIXER_SCLK, PIN_MIXER_SCLK);
rffc5071_target_select();
data[0] = rffc5071_spi_exchange_word(data[0], 9);
serial_delay();
gpio_set(PORT_MIXER_SCLK, PIN_MIXER_SCLK);
serial_delay();
gpio_clear(PORT_MIXER_SCLK, PIN_MIXER_SCLK);
/* start transaction by bringing ENX low */
gpio_clear(PORT_MIXER_ENX, PIN_MIXER_ENX);
while (bits--) {
if (data & msb)
gpio_set(PORT_MIXER_SDATA, PIN_MIXER_SDATA);
else
gpio_clear(PORT_MIXER_SDATA, PIN_MIXER_SDATA);
data <<= 1;
serial_delay();
gpio_set(PORT_MIXER_SCLK, PIN_MIXER_SCLK);
serial_delay();
gpio_clear(PORT_MIXER_SCLK, PIN_MIXER_SCLK);
if( direction_read ) {
rffc5071_spi_direction_in();
rffc5071_spi_sck();
}
data[1] = rffc5071_spi_exchange_word(data[1], 16);
rffc5071_spi_direction_out();
gpio_set(PORT_MIXER_ENX, PIN_MIXER_ENX);
rffc5071_spi_serial_delay();
rffc5071_target_unselect();
/*
* The device requires a clock while ENX is high after a serial
* transaction. This is not clearly documented.
*/
serial_delay();
gpio_set(PORT_MIXER_SCLK, PIN_MIXER_SCLK);
serial_delay();
gpio_clear(PORT_MIXER_SCLK, PIN_MIXER_SCLK);
rffc5071_spi_sck();
}

3
firmware/common/rffc5071_drv.h
View File

@ -33,7 +33,6 @@ typedef struct {
void rffc5071_pin_config(rffc5071_driver_t* const drv);
uint16_t rffc5071_spi_read(rffc5071_driver_t* const drv, uint8_t r);
void rffc5071_spi_write(rffc5071_driver_t* const drv, uint8_t r, uint16_t v);
void rffc5071_spi_transfer(rffc5071_driver_t* const drv, uint16_t* const data, const size_t count);
#endif // __RFFC5071_DRV_H