init_system.c File Reference

#include <stdint.h>
#include <stdbool.h>
#include <bsp/tms570.h>
#include <bsp/tms570-pinmux.h>
#include <bsp/tms570_selftest.h>
#include <bsp/tms570_hwinit.h>

Enumerations
enum	tms570_flash_power_modes { TMS570_FLASH_SYS_SLEEP = 0U, TMS570_FLASH_SYS_STANDBY = 1U, TMS570_FLASH_SYS_ACTIVE = 3U }
enum	tms570_system_clock_source {   TMS570_SYS_CLK_SRC_OSC = 0U, TMS570_SYS_CLK_SRC_PLL1 = 1U, TMS570_SYS_CLK_SRC_EXTERNAL1 = 3U, TMS570_SYS_CLK_SRC_LPO_LOW = 4U,   TMS570_SYS_CLK_SRC_LPO_HIGH = 5U, TMS570_SYS_CLK_SRC_PLL2 = 6U, TMS570_SYS_CLK_SRC_EXTERNAL2 = 7U, TMS570_SYS_CLK_SRC_VCLK = 9U }

Functions
void	tms570_pll_init (void)
	Setup all system PLLs (HCG:setupPLL) More...
void	tms570_trim_lpo_init (void)
	Adjust Low-Frequency (LPO) oscilator (HCG:trimLPO) More...
void	tms570_flash_init (void)
	Setup Flash memory parameters and timing (HCG:setupFlash) More...
void	tms570_periph_init (void)
	Power-up all peripherals and enable their clocks (HCG:periphInit) More...
void	tms570_map_clock_init (void)
	Setup chip clocks including to wait for PLLs locks (HCG:mapClocks) More...
void	tms570_system_hw_init (void)
	TMS570 system hardware initialization (HCG:systemInit) More...

Detailed Description

based on Ti HalCoGen generated file

Enumeration Type Documentation

tms570_flash_power_modes

enum tms570_flash_power_modes

Enumerator
TMS570_FLASH_SYS_SLEEP	Alias for flash bank power mode sleep
TMS570_FLASH_SYS_STANDBY	Alias for flash bank power mode standby
TMS570_FLASH_SYS_ACTIVE	Alias for flash bank power mode active

tms570_system_clock_source

enum tms570_system_clock_source

Enumerator
TMS570_SYS_CLK_SRC_OSC	Alias for oscillator clock Source
TMS570_SYS_CLK_SRC_PLL1	Alias for Pll1 clock Source
TMS570_SYS_CLK_SRC_EXTERNAL1	Alias for external clock Source
TMS570_SYS_CLK_SRC_LPO_LOW	Alias for low power oscillator low clock Source
TMS570_SYS_CLK_SRC_LPO_HIGH	Alias for low power oscillator high clock Source
TMS570_SYS_CLK_SRC_PLL2	Alias for Pll2 clock Source
TMS570_SYS_CLK_SRC_EXTERNAL2	Alias for external 2 clock Source
TMS570_SYS_CLK_SRC_VCLK	Alias for synchronous VCLK1 clock Source

Function Documentation

tms570_flash_init()

void tms570_flash_init

(

void

)

Setup Flash memory parameters and timing (HCG:setupFlash)

• Setup flash read mode, address wait states and data wait states
• Setup flash access wait states for bank 7
• Disable write access to flash state machine registers
• Setup flash bank power modes

tms570_map_clock_init()

void tms570_map_clock_init

(

void

)

Setup chip clocks including to wait for PLLs locks (HCG:mapClocks)

Initialize Clock Tree:

• Disable / Enable clock domain
• Wait for until clocks are locked
• Map device clock domains to desired sources and configure top-level dividers
• All clock domains are working off the default clock sources until now
• The below assignments can be easily modified using the HALCoGen GUI
• Setup GCLK, HCLK and VCLK clock source for normal operation, power down mode and after wakeup
• Setup synchronous peripheral clock dividers for VCLK1, VCLK2, VCLK3
• Setup RTICLK1 and RTICLK2 clocks
• Setup asynchronous peripheral clock sources for AVCLK1 and AVCLK2

tms570_periph_init()

void tms570_periph_init

(

void

)

Power-up all peripherals and enable their clocks (HCG:periphInit)

• Disable Peripherals before peripheral powerup
• Release peripherals from reset and enable clocks to all peripherals
• Power-up all peripherals
• Enable Peripherals

tms570_pll_init()

void tms570_pll_init

(

void

)

Setup all system PLLs (HCG:setupPLL)

• Configure PLL control registers

Initialize Pll1:

Initialize Pll2:

• Enable PLL(s) to start up or Lock

tms570_system_hw_init()

void tms570_system_hw_init

(

void

)

TMS570 system hardware initialization (HCG:systemInit)

• Set up flash address and data wait states based on the target CPU clock frequency The number of address and data wait states for the target CPU clock frequency are specified in the specific part's datasheet.

Configure the LPO such that HF LPO is as close to 10MHz as possible

• Wait for PLLs to start up and map clock domains to desired clock sources
• set ECLK pins functional mode
• set ECLK pins default output value
• set ECLK pins output direction
• set ECLK pins open drain enable
• set ECLK pins pullup/pulldown enable
• set ECLK pins pullup/pulldown select
• Setup ECLK

tms570_trim_lpo_init()

void tms570_trim_lpo_init

(

void

)

Adjust Low-Frequency (LPO) oscilator (HCG:trimLPO)

Initialize Lpo:

Load TRIM values from OTP if present else load user defined values