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max2837 and simpletx additions, still not quite working

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This commit is contained in:
Michael Ossmann
2012-06-11 15:09:33 -06:00
parent d01d201c14
commit d876ae7e86
4 changed files with 93 additions and 39 deletions
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28
firmware/common/hackrf_core.h
View File

@ -59,6 +59,14 @@ extern "C"
#define SCU_SSP1_SCK (P1_19) /* P1_19 */
#define SCU_SSP1_SSEL (P1_20) /* P1_20 */
/* MAX2837 GPIO (XCVR_CTL) PinMux */
#define SCU_XCVR_ENABLE (P4_6) /* GPIO2[6] on P4_6 */
#define SCU_XCVR_RXENABLE (P4_5) /* GPIO2[5] on P4_5 */
#define SCU_XCVR_TXENABLE (P4_4) /* GPIO2[4] on P4_4 */
/* MAX5864 SPI chip select (CS_AD) GPIO PinMux */
#define SCU_CS_AD (P5_7) /* GPIO2[7] on P5_7 */
/* TODO add other Pins */
/*
@ -74,6 +82,14 @@ extern "C"
#define PIN_EN1V8 (BIT6) /* GPIO3[6] on P6_10 */
#define PORT_EN1V8 (GPIO3)
#define PIN_XCVR_ENABLE (BIT6) /* GPIO2[6] on P4_6 */
#define PIN_XCVR_RXENABLE (BIT5) /* GPIO2[5] on P4_5 */
#define PIN_XCVR_TXENABLE (BIT4) /* GPIO2[4] on P4_4 */
#define PORT_XCVR_ENABLE (GPIO2) /* PORT for ENABLE, TXENABLE, RXENABLE */
#define PIN_CS_AD (BIT7) /* GPIO2[7] on P5_7 */
#define PORT_CS_AD (GPIO2) /* PORT for CS_AD */
/* GPIO Input */
#define PIN_BOOT0 (BIT8) /* GPIO0[8] on P1_1 */
#define PIN_BOOT1 (BIT9) /* GPIO0[9] on P1_2 */
@ -86,18 +102,6 @@ extern "C"
#define BOOT2_STATE ((GPIO5_PIN & PIN_BOOT2)==PIN_BOOT2)
#define BOOT3_STATE ((GPIO1_PIN & PIN_BOOT3)==PIN_BOOT3)
/* indicator LED control */
#define LED1_SET (GPIO_SET2 = PIN_LED1)
#define LED1_CLR (GPIO_CLR2 = PIN_LED1)
#define LED2_SET (GPIO_SET2 = PIN_LED2)
#define LED2_CLR (GPIO_CLR2 = PIN_LED2)
#define LED3_SET (GPIO_SET2 = PIN_LED3)
#define LED3_CLR (GPIO_CLR2 = PIN_LED3)
/* 1V8 control */
#define EN1V8_SET (GPIO_SET3 = PIN_EN1V8)
#define EN1V8_CLR (GPIO_CLR3 = PIN_EN1V8)
/* TODO add other Pins */
#endif

72
firmware/common/max2837.c
View File

@ -17,6 +17,9 @@
#else
#define LOG(x,...)
#include <libopencm3/lpc43xx/ssp.h>
#include <libopencm3/lpc43xx/scu.h>
#include <libopencm3/lpc43xx/gpio.h>
#include "hackrf_core.h"
#endif
/* Default register values. */
@ -59,6 +62,7 @@ uint16_t max2837_regs[MAX2837_NUM_REGS];
/* Mark all regsisters dirty so all will be written at init. */
uint32_t max2837_regs_dirty = 0xffffffff;
/* Set up all registers according to defaults specified in docs. */
void max2837_init(void)
{
LOG("# max2837_init\n");
@ -69,6 +73,66 @@ void max2837_init(void)
max2837_regs_commit();
}
/*
* Set up pins for GPIO and SPI control, configure SSP peripheral for SPI, and
* set our own default register configuration.
*/
void max2837_setup(void)
{
/* FIXME speed up once everything is working reliably */
const uint8_t serial_clock_rate = 32;
const uint8_t clock_prescale_rate = 128;
/* Configure XCVR_CTL GPIO pins. */
scu_pinmux(SCU_XCVR_ENABLE, SCU_GPIO_FAST);
scu_pinmux(SCU_XCVR_RXENABLE, SCU_GPIO_FAST);
scu_pinmux(SCU_XCVR_TXENABLE, SCU_GPIO_FAST);
/* Set GPIO pins as outputs. */
GPIO2_DIR |= (PIN_XCVR_ENABLE | PIN_XCVR_RXENABLE | PIN_XCVR_TXENABLE);
/* disable everything */
gpio_clear(PORT_XCVR_ENABLE,
(PIN_XCVR_ENABLE | PIN_XCVR_RXENABLE | PIN_XCVR_TXENABLE));
/*
* Configure CS_AD pin to keep the MAX5864 SPI disabled while we use the
* SPI bus for the MAX2837. FIXME: this should probably be somewhere else.
*/
scu_pinmux(SCU_CS_AD, SCU_GPIO_FAST);
GPIO2_DIR |= PIN_CS_AD;
gpio_set(PORT_CS_AD, PIN_CS_AD);
/* Configure SSP1 Peripheral (to be moved later in SSP driver) */
scu_pinmux(SCU_SSP1_MISO, (SCU_SSP_IO | SCU_CONF_FUNCTION5));
scu_pinmux(SCU_SSP1_MOSI, (SCU_SSP_IO | SCU_CONF_FUNCTION5));
scu_pinmux(SCU_SSP1_SCK, (SCU_SSP_IO | SCU_CONF_FUNCTION1));
scu_pinmux(SCU_SSP1_SSEL, (SCU_SSP_IO | SCU_CONF_FUNCTION1));
ssp_init(SSP1_NUM,
SSP_DATA_16BITS,
SSP_FRAME_SPI,
SSP_CPOL_0_CPHA_0,
serial_clock_rate,
clock_prescale_rate,
SSP_MODE_NORMAL,
SSP_MASTER,
SSP_SLAVE_OUT_ENABLE);
max2837_init();
/* Use SPI control instead of B1-B7 pins for gain settings. */
set_MAX2837_TXVGA_GAIN_SPI_EN(1);
set_MAX2837_TXVGA_GAIN_MSB_SPI_EN(1);
set_MAX2837_TXVGA_GAIN(0x3f); /* maximum attenuation */
set_MAX2837_LNAgain_SPI_EN(1);
set_MAX2837_LNAgain(MAX2837_LNAgain_MAX); /* maximum gain */
set_MAX2837_VGAgain_SPI_EN(1);
set_MAX2837_VGA(0x00); /* minimum attenuation */
max2837_regs_commit();
}
/* SPI register read. */
uint16_t max2837_spi_read(uint8_t r) {
return 0;
@ -128,22 +192,22 @@ void max2837_start(void)
LOG("# max2837_start\n");
set_MAX2837_EN_SPI(1);
max2837_regs_commit();
/* TODO ENABLE pin */
gpio_set(PORT_XCVR_ENABLE, PIN_XCVR_ENABLE);
}
void max2837_tx(void)
{
LOG("# max2837_tx\n");
/* TODO TXENABLE pin */
gpio_set(PORT_XCVR_ENABLE, PIN_XCVR_TXENABLE);
}
/* TODO - placeholder */
void max2837_stop(void)
{
LOG("# max2837_stop\n");
set_MAX2837_EN_SPI(0);
max2837_regs_commit();
/* TODO ENABLE pin */
gpio_clear(PORT_XCVR_ENABLE,
(PIN_XCVR_ENABLE | PIN_XCVR_RXENABLE | PIN_XCVR_TXENABLE));
}
void max2837_set_frequency(uint32_t freq)

3
firmware/common/max2837.h
View File

@ -15,6 +15,7 @@ extern uint32_t max2837_regs_dirty;
/* Initialize chip. */
extern void max2837_init(void);
extern void max2837_setup(void);
/* Read a register via SPI. Save a copy to memory and return
* value. Mark clean. */
@ -40,4 +41,6 @@ extern void max2837_stop(void);
* where order of register writes matters. */
extern void max2837_set_frequency(uint32_t freq);
extern void max2837_tx(void);
#endif // __MAX2837_H

29
firmware/simpletx/simpletx.c
View File

@ -51,18 +51,11 @@ void pin_setup(void)
/* GPIO3[6] on P6_10 as output. */
GPIO3_DIR |= PIN_EN1V8;
/* Configure SSP1 Peripheral (to be moved later in SSP driver) */
scu_pinmux(SCU_SSP1_MISO, (SCU_SSP_IO | SCU_CONF_FUNCTION5));
scu_pinmux(SCU_SSP1_MOSI, (SCU_SSP_IO | SCU_CONF_FUNCTION5));
scu_pinmux(SCU_SSP1_SCK, (SCU_SSP_IO | SCU_CONF_FUNCTION1));
scu_pinmux(SCU_SSP1_SSEL, (SCU_SSP_IO | SCU_CONF_FUNCTION1));
}
int main(void)
{
u8 serial_clock_rate;
u8 clock_prescale_rate;
const uint32_t freq = 2441000000U;
pin_setup();
gpio_set(PORT_EN1V8, PIN_EN1V8); /* 1V8 on */
@ -70,22 +63,12 @@ int main(void)
gpio_set(PORT_LED1_3, (PIN_LED1)); /* LED1 on */
clock_prescale_rate = 2;
serial_clock_rate = 128;
ssp_init(SSP1_NUM,
SSP_DATA_16BITS,
SSP_FRAME_SPI,
SSP_CPOL_0_CPHA_0,
serial_clock_rate,
clock_prescale_rate,
SSP_MODE_NORMAL,
SSP_MASTER,
SSP_SLAVE_OUT_ENABLE);
max2837_init();
max2837_setup();
gpio_set(PORT_LED1_3, (PIN_LED2)); /* LED2 on */
max2837_set_frequency(freq);
max2837_tx();
max2837_start();
max2837_set_frequency(2441000000);
gpio_set(PORT_LED1_3, (PIN_LED3)); /* LED3 on */
while (1);
max2837_stop();