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Fix for "issues/62 fix PLL1 overclock bug" see hackrf_core.c -> cpu_clock_init()

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Fix for "issues/78 startup current too high" see hackrf_core.c -> New functions cpu_clock_pll1_low_speed()/cpu_clock_pll1_max_speed() & hackrf_usb.c to switch low_speed/max_speed.
This commit is contained in:
TitanMKD
2013-08-28 22:01:57 +02:00
parent 2648107a0b
commit 24ed48d93a
3 changed files with 151 additions and 22 deletions
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160
firmware/common/hackrf_core.c
View File

@ -31,6 +31,8 @@
#include <libopencm3/lpc43xx/scu.h>
#include <libopencm3/lpc43xx/ssp.h>
#define WAIT_CPU_CLOCK_INIT_DELAY (10000)
void delay(uint32_t duration)
{
uint32_t i;
@ -232,9 +234,13 @@ bool baseband_filter_bandwidth_set(const uint32_t bandwidth_hz) {
return max2837_set_lpf_bandwidth(bandwidth_hz);
}
/* clock startup for Jellybean with Lemondrop attached */
/* clock startup for Jellybean with Lemondrop attached
Configure PLL1 to max speed (204MHz).
Note: PLL1 clock is used by M4/M0 core, Peripheral, APB1. */
void cpu_clock_init(void)
{
uint32_t pll_reg;
/* use IRC as clock source for APB1 (including I2C0) */
CGU_BASE_APB1_CLK = CGU_BASE_APB1_CLK_CLK_SEL(CGU_SRC_IRC);
@ -328,36 +334,59 @@ void cpu_clock_init(void)
/* power on the oscillator and wait until stable */
CGU_XTAL_OSC_CTRL &= ~CGU_XTAL_OSC_CTRL_ENABLE;
/* Wait about 100us after Crystal Power ON */
delay(WAIT_CPU_CLOCK_INIT_DELAY);
/* use XTAL_OSC as clock source for BASE_M4_CLK (CPU) */
CGU_BASE_M4_CLK = CGU_BASE_M4_CLK_CLK_SEL(CGU_SRC_XTAL);
CGU_BASE_M4_CLK = (CGU_BASE_M4_CLK_CLK_SEL(CGU_SRC_XTAL) | CGU_BASE_M4_CLK_AUTOBLOCK);
/* use XTAL_OSC as clock source for APB1 */
CGU_BASE_APB1_CLK = CGU_BASE_APB1_CLK_AUTOBLOCK
| CGU_BASE_APB1_CLK_CLK_SEL(CGU_SRC_XTAL);
/* use XTAL_OSC as clock source for PLL1 */
/* Start PLL1 at 12MHz * 17 / (2+2) = 51MHz. */
CGU_PLL1_CTRL = CGU_PLL1_CTRL_CLK_SEL(CGU_SRC_XTAL)
| CGU_PLL1_CTRL_PSEL(1)
| CGU_PLL1_CTRL_NSEL(0)
| CGU_PLL1_CTRL_MSEL(16)
| CGU_PLL1_CTRL_PD;
/* power on PLL1 and wait until stable */
CGU_PLL1_CTRL &= ~CGU_PLL1_CTRL_PD;
/* Configure PLL1 to Intermediate Clock (between 90 MHz and 110 MHz) */
/* Integer mode:
FCLKOUT = M*(FCLKIN/N)
FCCO = 2*P*FCLKOUT = 2*P*M*(FCLKIN/N)
*/
pll_reg = CGU_PLL1_CTRL;
/* Clear PLL1 bits */
pll_reg &= ~( CGU_PLL1_CTRL_CLK_SEL_MASK | CGU_PLL1_CTRL_PD | CGU_PLL1_CTRL_FBSEL | /* CLK SEL, PowerDown , FBSEL */
CGU_PLL1_CTRL_BYPASS | /* BYPASS */
CGU_PLL1_CTRL_DIRECT | /* DIRECT */
CGU_PLL1_CTRL_PSEL_MASK | CGU_PLL1_CTRL_MSEL_MASK | CGU_PLL1_CTRL_NSEL_MASK ); /* PSEL, MSEL, NSEL- divider ratios */
/* Set PLL1 up to 12MHz * 8 = 96MHz. */
pll_reg |= CGU_PLL1_CTRL_CLK_SEL(CGU_SRC_XTAL)
| CGU_PLL1_CTRL_PSEL(0)
| CGU_PLL1_CTRL_NSEL(0)
| CGU_PLL1_CTRL_MSEL(7)
| CGU_PLL1_CTRL_FBSEL;
CGU_PLL1_CTRL = pll_reg;
/* wait until stable */
while (!(CGU_PLL1_STAT & CGU_PLL1_STAT_LOCK));
/* use PLL1 as clock source for BASE_M4_CLK (CPU) */
CGU_BASE_M4_CLK = CGU_BASE_M4_CLK_CLK_SEL(CGU_SRC_PLL1);
CGU_BASE_M4_CLK = (CGU_BASE_M4_CLK_CLK_SEL(CGU_SRC_PLL1) | CGU_BASE_M4_CLK_AUTOBLOCK);
/* Move PLL1 up to 12MHz * 17 = 204MHz. */
CGU_PLL1_CTRL = CGU_PLL1_CTRL_CLK_SEL(CGU_SRC_XTAL)
| CGU_PLL1_CTRL_PSEL(0)
| CGU_PLL1_CTRL_NSEL(0)
/* Wait before to switch to max speed */
delay(WAIT_CPU_CLOCK_INIT_DELAY);
/* Configure PLL1 Max Speed */
/* Direct mode: FCLKOUT = FCCO = M*(FCLKIN/N) */
pll_reg = CGU_PLL1_CTRL;
/* Clear PLL1 bits */
pll_reg &= ~( CGU_PLL1_CTRL_CLK_SEL_MASK | CGU_PLL1_CTRL_PD | CGU_PLL1_CTRL_FBSEL | /* CLK SEL, PowerDown , FBSEL */
CGU_PLL1_CTRL_BYPASS | /* BYPASS */
CGU_PLL1_CTRL_DIRECT | /* DIRECT */
CGU_PLL1_CTRL_PSEL_MASK | CGU_PLL1_CTRL_MSEL_MASK | CGU_PLL1_CTRL_NSEL_MASK ); /* PSEL, MSEL, NSEL- divider ratios */
/* Set PLL1 up to 12MHz * 17 = 204MHz. */
pll_reg |= CGU_PLL1_CTRL_CLK_SEL(CGU_SRC_XTAL)
| CGU_PLL1_CTRL_PSEL(0)
| CGU_PLL1_CTRL_NSEL(0)
| CGU_PLL1_CTRL_MSEL(16)
| CGU_PLL1_CTRL_FBSEL;
//| CGU_PLL1_CTRL_DIRECT;
| CGU_PLL1_CTRL_FBSEL
| CGU_PLL1_CTRL_DIRECT;
CGU_PLL1_CTRL = pll_reg;
/* wait until stable */
while (!(CGU_PLL1_STAT & CGU_PLL1_STAT_LOCK));
@ -393,6 +422,97 @@ void cpu_clock_init(void)
| CGU_BASE_APB1_CLK_CLK_SEL(CGU_SRC_PLL1);
}
/*
Configure PLL1 to low speed (48MHz).
Note: PLL1 clock is used by M4/M0 core, Peripheral, APB1.
This function shall be called after cpu_clock_init().
This function is mainly used to lower power consumption.
*/
void cpu_clock_pll1_low_speed(void)
{
uint32_t pll_reg;
/* Configure PLL1 Clock (48MHz) */
/* Integer mode:
FCLKOUT = M*(FCLKIN/N)
FCCO = 2*P*FCLKOUT = 2*P*M*(FCLKIN/N)
*/
pll_reg = CGU_PLL1_CTRL;
/* Clear PLL1 bits */
pll_reg &= ~( CGU_PLL1_CTRL_CLK_SEL_MASK | CGU_PLL1_CTRL_PD | CGU_PLL1_CTRL_FBSEL | /* CLK SEL, PowerDown , FBSEL */
CGU_PLL1_CTRL_BYPASS | /* BYPASS */
CGU_PLL1_CTRL_DIRECT | /* DIRECT */
CGU_PLL1_CTRL_PSEL_MASK | CGU_PLL1_CTRL_MSEL_MASK | CGU_PLL1_CTRL_NSEL_MASK ); /* PSEL, MSEL, NSEL- divider ratios */
/* Set PLL1 up to 12MHz * 7 = 48MHz. */
pll_reg |= CGU_PLL1_CTRL_CLK_SEL(CGU_SRC_XTAL)
| CGU_PLL1_CTRL_PSEL(0)
| CGU_PLL1_CTRL_NSEL(0)
| CGU_PLL1_CTRL_MSEL(6)
| CGU_PLL1_CTRL_FBSEL
| CGU_PLL1_CTRL_DIRECT;
CGU_PLL1_CTRL = pll_reg;
/* wait until stable */
while (!(CGU_PLL1_STAT & CGU_PLL1_STAT_LOCK));
/* Wait a delay after switch to new frequency with Direct mode */
delay(WAIT_CPU_CLOCK_INIT_DELAY);
}
/*
Configure PLL1 (Main MCU Clock) to max speed (204MHz).
Note: PLL1 clock is used by M4/M0 core, Peripheral, APB1.
This function shall be called after cpu_clock_init().
*/
void cpu_clock_pll1_max_speed(void)
{
uint32_t pll_reg;
/* Configure PLL1 to Intermediate Clock (between 90 MHz and 110 MHz) */
/* Integer mode:
FCLKOUT = M*(FCLKIN/N)
FCCO = 2*P*FCLKOUT = 2*P*M*(FCLKIN/N)
*/
pll_reg = CGU_PLL1_CTRL;
/* Clear PLL1 bits */
pll_reg &= ~( CGU_PLL1_CTRL_CLK_SEL_MASK | CGU_PLL1_CTRL_PD | CGU_PLL1_CTRL_FBSEL | /* CLK SEL, PowerDown , FBSEL */
CGU_PLL1_CTRL_BYPASS | /* BYPASS */
CGU_PLL1_CTRL_DIRECT | /* DIRECT */
CGU_PLL1_CTRL_PSEL_MASK | CGU_PLL1_CTRL_MSEL_MASK | CGU_PLL1_CTRL_NSEL_MASK ); /* PSEL, MSEL, NSEL- divider ratios */
/* Set PLL1 up to 12MHz * 8 = 96MHz. */
pll_reg |= CGU_PLL1_CTRL_CLK_SEL(CGU_SRC_XTAL)
| CGU_PLL1_CTRL_PSEL(0)
| CGU_PLL1_CTRL_NSEL(0)
| CGU_PLL1_CTRL_MSEL(7)
| CGU_PLL1_CTRL_FBSEL;
CGU_PLL1_CTRL = pll_reg;
/* wait until stable */
while (!(CGU_PLL1_STAT & CGU_PLL1_STAT_LOCK));
/* Wait before to switch to max speed */
delay(WAIT_CPU_CLOCK_INIT_DELAY);
/* Configure PLL1 Max Speed */
/* Direct mode: FCLKOUT = FCCO = M*(FCLKIN/N) */
pll_reg = CGU_PLL1_CTRL;
/* Clear PLL1 bits */
pll_reg &= ~( CGU_PLL1_CTRL_CLK_SEL_MASK | CGU_PLL1_CTRL_PD | CGU_PLL1_CTRL_FBSEL | /* CLK SEL, PowerDown , FBSEL */
CGU_PLL1_CTRL_BYPASS | /* BYPASS */
CGU_PLL1_CTRL_DIRECT | /* DIRECT */
CGU_PLL1_CTRL_PSEL_MASK | CGU_PLL1_CTRL_MSEL_MASK | CGU_PLL1_CTRL_NSEL_MASK ); /* PSEL, MSEL, NSEL- divider ratios */
/* Set PLL1 up to 12MHz * 17 = 204MHz. */
pll_reg |= CGU_PLL1_CTRL_CLK_SEL(CGU_SRC_XTAL)
| CGU_PLL1_CTRL_PSEL(0)
| CGU_PLL1_CTRL_NSEL(0)
| CGU_PLL1_CTRL_MSEL(16)
| CGU_PLL1_CTRL_FBSEL
| CGU_PLL1_CTRL_DIRECT;
CGU_PLL1_CTRL = pll_reg;
/* wait until stable */
while (!(CGU_PLL1_STAT & CGU_PLL1_STAT_LOCK));
}
void ssp1_init(void)
{
/*

2
firmware/common/hackrf_core.h
View File

@ -251,6 +251,8 @@ typedef enum {
void delay(uint32_t duration);
void cpu_clock_init(void);
void cpu_clock_pll1_low_speed(void);
void cpu_clock_pll1_max_speed(void);
void ssp1_init(void);
void ssp1_set_mode_max2837(void);
void ssp1_set_mode_max5864(void);

9
firmware/hackrf_usb/hackrf_usb.c
View File

@ -911,11 +911,17 @@ bool usb_set_configuration(
if( new_configuration == 0 ) {
return false;
}
}
}else
{
/* Configuration number equal 0 means usb bus reset,
set MCU freq to low power consumption */
cpu_clock_pll1_low_speed();
}
if( new_configuration != device->configuration ) {
// Configuration changed.
device->configuration = new_configuration;
cpu_clock_pll1_max_speed(); /* Switch MCU clock to max speed */
set_transceiver_mode(transceiver_mode);
if( device->configuration ) {
@ -997,6 +1003,7 @@ int main(void) {
pin_setup();
enable_1v8_power();
cpu_clock_init();
cpu_clock_pll1_low_speed();
usb_peripheral_reset();