feat(max2871.c): Set the default values after reset

firmware/common/hackrf_core.h

@@ -160,10 +160,10 @@ extern "C"
 #define SCU_MIXER_RESETX    (P5_5)  /* GPIO2[14] on P5_5 */
 #endif
 #ifdef RAD10
-#define SCU_MIXER_ENX       (P5_4)  /* GPIO2[13] on P5_4 */
+#define SCU_VCO_CE          (P5_4)  /* GPIO2[13] on P5_4 */
-#define SCU_MIXER_SCLK      (P2_6)  /* GPIO5[6] on P2_6 */
+#define SCU_VCO_SCLK        (P2_6)  /* GPIO5[6] on P2_6 */
-#define SCU_MIXER_SDATA     (P6_4)  /* GPIO3[3] on P6_4 */
+#define SCU_VCO_SDATA       (P6_4)  /* GPIO3[3] on P6_4 */
-#define SCU_MIXER_LE        (P5_5)  /* GPIO2[14] on P5_5 */
+#define SCU_VCO_LE          (P5_5)  /* GPIO2[14] on P5_5 */
 #define SCU_MIXER_EN        (P6_8)  /* GPIO5[16] on P6_8 */
 #endif
 
@@ -315,14 +315,14 @@ extern "C"
 #define PORT_MIXER_RESETX (GPIO2)
 #endif
 #ifdef RAD10
-#define PIN_MIXER_ENX     (BIT13) /* GPIO2[13] on P5_4 */
+#define PIN_VCO_CE        (BIT13) /* GPIO2[13] on P5_4 */
-#define PORT_MIXER_ENX    (GPIO2)
+#define PORT_VCO_CE       (GPIO2)
-#define PIN_MIXER_SCLK    (BIT6)  /* GPIO5[6] on P2_6 */
+#define PIN_VCO_SCLK      (BIT6)  /* GPIO5[6] on P2_6 */
-#define PORT_MIXER_SCLK   (GPIO5)
+#define PORT_VCO_SCLK     (GPIO5)
-#define PIN_MIXER_SDATA   (BIT3)  /* GPIO3[3] on P6_4 */
+#define PIN_VCO_SDATA     (BIT3)  /* GPIO3[3] on P6_4 */
-#define PORT_MIXER_SDATA  (GPIO3)
+#define PORT_VCO_SDATA    (GPIO3)
-#define PIN_MIXER_LE      (BIT14) /* GPIO2[14] on P5_5 */
+#define PIN_VCO_LE        (BIT14) /* GPIO2[14] on P5_5 */
-#define PORT_MIXER_LE     (GPIO2)
+#define PORT_VCO_LE       (GPIO2)
 #define PIN_MIXER_EN      (BIT16) /* GPIO5[16] on P6_8 */
 #define PORT_MIXER_EN     (GPIO5)
 #endif

firmware/common/max2871.c

@@ -1,5 +1,25 @@
-#include <stdint.h>
+#include "mixer.h"
+//#include "max2871.h"
+//#include "mac2871_regs.def" // private register def macros
 
+#if (defined DEBUG)
+#include <stdio.h>
+#define LOG printf
+#else
+#define LOG(x,...)
+#include <libopencm3/lpc43xx/ssp.h>
+#include <libopencm3/lpc43xx/scu.h>
+#include <libopencm3/lpc43xx/gpio.h>
+#include "hackrf_core.h"
+#endif
+
+#include <stdint.h>
+#include <string.h>
+
+static void max2871_spi_write(uint8_t r, uint32_t v);
+static void delay_ms(int ms);
+
+static uint32_t registers[6];
 /*
  * - The input is fixed to 50 MHz
  * f_REF = 50 MHz
@@ -116,10 +136,110 @@
  *
  */
 
-void mixer_init(void)
-{}
 void mixer_setup(void)
-{}
+{
+	/* Configure GPIO pins. */
+	scu_pinmux(SCU_VCO_CE, SCU_GPIO_FAST);
+	//scu_pinmux(SCU_VCO_SCLK, SCU_GPIO_FAST | SCU_CONF_FUNCTION4);
+	scu_pinmux(SCU_VCO_SCLK, SCU_GPIO_FAST);
+	scu_pinmux(SCU_VCO_SDATA, SCU_GPIO_FAST);
+	scu_pinmux(SCU_VCO_LE, SCU_GPIO_FAST);
+
+	/* Set GPIO pins as outputs. */
+	GPIO_DIR(PORT_VCO_CE) |= PIN_VCO_CE;
+	GPIO_DIR(PORT_VCO_SCLK) |= PIN_VCO_SCLK;
+	GPIO_DIR(PORT_VCO_SDATA) |= PIN_VCO_SDATA;
+	GPIO_DIR(PORT_VCO_LE) |= PIN_VCO_LE;
+
+	/* set to known state */
+	gpio_set(PORT_VCO_CE, PIN_VCO_CE); /* active high */
+	gpio_clear(PORT_VCO_SCLK, PIN_VCO_SCLK);
+	gpio_clear(PORT_VCO_SDATA, PIN_VCO_SDATA);
+	gpio_set(PORT_VCO_LE, PIN_VCO_LE); /* active low */
+
+    registers[0] = 0x007D0000;
+    registers[1] = 0x2000FFF9;
+    registers[2] = 0x00004042;
+    registers[3] = 0x0000000B;
+    registers[4] = 0x6180B23C;
+    registers[5] = 0x00400005;
+
+    int i;
+    for(i = 5; i >= 0; i--) {
+        max2871_spi_write(i, registers[i]);
+        delay_ms(20);
+    }
+}
+
+static void delay_ms(int ms)
+{
+	uint32_t i;
+    while(ms--) {
+        for (i = 0; i < 20000; i++) {
+            __asm__("nop");
+        }
+    }
+}
+
+
+static void serial_delay(void)
+{
+	uint32_t i;
+
+	for (i = 0; i < 2; i++)
+		__asm__("nop");
+}
+
+
+/* SPI register write
+ *
+ * Send 32 bits:
+ *  First 29 bits are data
+ *  Last 3 bits are register number
+ */
+static void max2871_spi_write(uint8_t r, uint32_t v) {
+
+#if DEBUG
+	LOG("0x%04x -> reg%d\n", v, r);
+#else
+
+	uint32_t bits = 32;
+	uint32_t msb = 1 << (bits -1);
+	uint32_t data = v | r;
+
+	/* make sure everything is starting in the correct state */
+	gpio_set(PORT_VCO_LE, PIN_VCO_LE);
+	gpio_clear(PORT_VCO_SCLK, PIN_VCO_SCLK);
+	gpio_clear(PORT_VCO_SDATA, PIN_VCO_SDATA);
+
+	/* start transaction by bringing LE low */
+	gpio_clear(PORT_VCO_LE, PIN_VCO_LE);
+
+	while (bits--) {
+		if (data & msb)
+			gpio_set(PORT_VCO_SDATA, PIN_VCO_SDATA);
+		else
+			gpio_clear(PORT_VCO_SDATA, PIN_VCO_SDATA);
+		data <<= 1;
+
+		serial_delay();
+		gpio_set(PORT_VCO_SCLK, PIN_VCO_SCLK);
+
+		serial_delay();
+		gpio_clear(PORT_VCO_SCLK, PIN_VCO_SCLK);
+	}
+
+	gpio_set(PORT_VCO_LE, PIN_VCO_LE);
+#endif
+}
+
+void max2871_write_registers(void)
+{
+    int i;
+    for(i = 5; i >= 0; i--) {
+        max2871_spi_write(i, registers[i]);
+    }
+}
 
 /* Set frequency (MHz). */
 uint64_t mixer_set_frequency(uint16_t mhz)

firmware/common/mixer.h

@@ -23,6 +23,8 @@
 #ifndef __MIXER_H
 #define __MIXER_H
 
+#include <stdint.h>
+
 /* Initialize chip. Call _setup() externally, as it calls _init(). */
 extern void mixer_init(void);
 extern void mixer_setup(void);

firmware/common/rf_path.c

@@ -99,9 +99,11 @@ static void switchctrl_set_rad10(uint8_t ctrl) {
 	if (ctrl & SWITCHCTRL_MIX_BYPASS) {
 		gpio_clear(PORT_BY_MIX, PIN_BY_MIX);
 		gpio_set(PORT_BY_MIX_N, PIN_BY_MIX_N);
+		gpio_clear(PORT_MIXER_EN, PIN_MIXER_EN);
 	} else {
 		gpio_set(PORT_BY_MIX, PIN_BY_MIX);
 		gpio_clear(PORT_BY_MIX_N, PIN_BY_MIX_N);
+		gpio_set(PORT_MIXER_EN, PIN_MIXER_EN);
 	}
 
 	if (ctrl & SWITCHCTRL_HP) {
@@ -301,6 +303,7 @@ void rf_path_pin_setup() {
     scu_pinmux(SCU_LOW_HIGH_FILT_N,SCU_GPIO_FAST | SCU_CONF_FUNCTION0);
     scu_pinmux(SCU_TX_AMP,         SCU_GPIO_FAST | SCU_CONF_FUNCTION0);
     scu_pinmux(SCU_RX_LNA,         SCU_GPIO_FAST | SCU_CONF_FUNCTION4);
+    scu_pinmux(SCU_MIXER_EN,       SCU_GPIO_FAST | SCU_CONF_FUNCTION4);
 
 	/* Configure RF power supply (VAA) switch */
 	scu_pinmux(SCU_VAA_ENABLE,  SCU_GPIO_FAST | SCU_CONF_FUNCTION0);
@@ -310,6 +313,7 @@ void rf_path_pin_setup() {
 	GPIO1_DIR |= PIN_BY_AMP | PIN_TX_RX_N | PIN_BY_MIX;
 	GPIO2_DIR |= PIN_BY_MIX_N | PIN_LOW_HIGH_FILT | PIN_LOW_HIGH_FILT_N | PIN_TX_AMP;
 	GPIO5_DIR |= PIN_BY_AMP_N | PIN_RX_LNA;
+	GPIO_DIR(PORT_MIXER_EN) |= PIN_MIXER_EN;
 
 	/*
 	 * Safe (initial) switch settings turn off both amplifiers and antenna port

firmware/hackrf_usb/hackrf_usb.c

@@ -219,7 +219,7 @@ void usb_set_descriptor_by_serial_number(void)
 int main(void) {
 	pin_setup();
 	enable_1v8_power();
-#ifdef HACKRF_ONE
+#if (defined HACKRF_ONE || defined RAD10)
 	enable_rf_power();
 #endif
 	cpu_clock_init();