tms570_hwinit.h File Reference

This header file provides interfaces of the hardware initialization support. More...

#include <bspopts.h>
#include <stdint.h>
#include <bsp/start.h>

Go to the source code of this file.

Functions
void	_esmCcmErrorsClear_ (void)
void	_coreEnableEventBusExport_ (void)
void	_errata_CORTEXR4_66_ (void)
void	_errata_CORTEXR4_57_ (void)
void	_coreEnableRamEcc_ (void)
void	_coreDisableRamEcc_ (void)
void	_mpuInit_ (void)
void	tms570_memory_init (uint32_t ram)
void	tms570_trim_lpo_init (void)
	Adjust Low-Frequency (LPO) oscilator (HCG:trimLPO).
void	tms570_flash_init (void)
	Setup Flash memory parameters and timing (HCG:setupFlash).
void	tms570_periph_init (void)
	Power-up all peripherals and enable their clocks (HCG:periphInit).
void	tms570_system_hw_init (void)
	TMS570 system hardware initialization (HCG:systemInit).
void	tms570_esm_init (void)
	Error signaling module initialization (HCG:esmInit).
void	tms570_emif_sdram_init (void)
	Initialize the External Memory InterFace (EMIF) peripheral.
void	tms570_pll_init (void)
	Initialize PLLs source divider/multipliers.
void	tms570_map_clock_init (void)
	Initialize the tms570 Global Clock Manager (GCM) registers which sub-divide the input clock source (generally PLL) into the various peripheral clocks (VCLK1-3, etc).
void	tms570_pinmux_init (void)
	Initialize the tms570 PINMUX peripheral. This maps signals to pin terminals.

Detailed Description

This header file provides interfaces of the hardware initialization support.

Function Documentation

tms570_esm_init()

void tms570_esm_init

(

void

)

Error signaling module initialization (HCG:esmInit).

• Disable error pin channels

• Disable interrupts

• Clear error status flags

• Setup LPC preload

• Reset error pin

• Clear interrupt level

• Set interrupt level

• Enable error pin channels

• Enable interrupts

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

)

Initialize the tms570 Global Clock Manager (GCM) registers which sub-divide the input clock source (generally PLL) into the various peripheral clocks (VCLK1-3, etc).

Initialize Clock Tree:

• Disable / Enable clock domain

• Setup RTICLK1 and RTICLK2 clocks

• Setup asynchronous peripheral clock sources for AVCLK1 and AVCLK2

• Setup synchronous peripheral clock dividers for VCLK1, VCLK2, VCLK3

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

)

Initialize PLLs source divider/multipliers.

Setup all system PLLs (HCG:setupPLL).

Initialize PLLs source divider/multipliers.

• Setup pll control register 1:
• Disable reset on oscillator slip (ROS)
• Enable bypass on pll slip TODO: desired: switches to OSC when PLL slip detected
• setup Pll output clock divider to max before Lock
• Disable reset on oscillator fail
• Setup reference clock divider
• Setup Pll multiplier
• PLL1: 16MHz OSC in -> 300MHz PLL1 out

• Setup pll control register 2
• Setup spreading rate
• Setup bandwidth adjustment
• Setup internal Pll output divider
• Setup spreading amount

• Setup pll2 control register :
• setup Pll output clock divider to max before Lock
• Setup reference clock divider
• Setup internal Pll output divider
• Setup Pll multiplier

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

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