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Diffstat (limited to 'c/src/lib/libbsp/arm/lpc176x/startup/bspstarthooks.c')
| -rw-r--r-- | c/src/lib/libbsp/arm/lpc176x/startup/bspstarthooks.c | 227 |
1 files changed, 0 insertions, 227 deletions
diff --git a/c/src/lib/libbsp/arm/lpc176x/startup/bspstarthooks.c b/c/src/lib/libbsp/arm/lpc176x/startup/bspstarthooks.c deleted file mode 100644 index a60c5bdf89..0000000000 --- a/c/src/lib/libbsp/arm/lpc176x/startup/bspstarthooks.c +++ /dev/null @@ -1,227 +0,0 @@ -/** - * @file bspstarthooks.c - * - * @ingroup lpc176x - * - * @brief First configurations and initializations to the correct - * functionality of the board. - */ - -/* - * Copyright (c) 2014 Taller Technologies. - * - * @author Boretto Martin (martin.boretto@tallertechnologies.com) - * @author Diaz Marcos (marcos.diaz@tallertechnologies.com) - * @author Lenarduzzi Federico (federico.lenarduzzi@tallertechnologies.com) - * @author Daniel Chicco (daniel.chicco@tallertechnologies.com) - * - * The license and distribution terms for this file may be - * found in the file LICENSE in this distribution or at - * http://www.rtems.org/license/LICENSE. - */ - -#include <bsp.h> -#include <bsp/start.h> -#include <bsp/io.h> - -/** - * @brief Initializes the oscillator according to the lpc176x board. - */ -static BSP_START_TEXT_SECTION void lpc176x_init_main_oscillator( void ) -{ - if ( ( LPC176X_SCB.scs & LPC176X_SCB_SCS_OSC_STATUS ) == 0u ) { - LPC176X_SCB.scs |= LPC176X_SCB_SCS_OSC_ENABLE; - - while ( ( LPC176X_SCB.scs & LPC176X_SCB_SCS_OSC_STATUS ) == 0u ) { - /* Wait. */ - } - } - - /* else implies that the oscillator is initialized. Also, - there is nothing to do. */ -} - -/** - * @brief Sets the PLL configuration. - * - * @param pll Value to set. - * @param val Set value. - */ -static BSP_START_TEXT_SECTION void lpc176x_pll_config( const uint32_t val ) -{ - ( LPC176X_SCB.pll_0 ).con = val; - /* The two register writes must be in correct sequence. */ - ( LPC176X_SCB.pll_0 ).feed = LPC176X_PLL0CON; - ( LPC176X_SCB.pll_0 ).feed = LPC176X_PLL0CFG; -} - -/** - * @brief Sets the PLL. - * - * @param msel Multiplier value. - * @param psel Divider value. - * @param cclkdiv Divisor clock. - */ -static BSP_START_TEXT_SECTION void lpc176x_set_pll( - const unsigned msel, - const unsigned psel, - const unsigned cclkdiv -) -{ - const uint32_t pllcfg = LPC176X_PLL_SEL_MSEL( msel ) | - LPC176X_PLL_SEL_PSEL( psel ); - const uint32_t pllstat = LPC176X_PLL_STAT_PLLE | LPC176X_PLL_STAT_PLOCK | - pllcfg; - const uint32_t cclksel_cclkdiv = LPC176X_SCB_CCLKSEL_CCLKDIV( cclkdiv ); - - if ( ( LPC176X_SCB.pll_0 ).stat != pllstat - || LPC176X_SCB.cclksel != cclksel_cclkdiv - || LPC176X_SCB.clksrcsel != LPC176X_SCB_CLKSRCSEL_CLKSRC ) { - lpc176x_pll_config( ( LPC176X_SCB.pll_0 ).con & ~LPC176X_PLL_CON_PLLC ); - - /* Turn off USB. */ - LPC176X_SCB.usbclksel = 0u; - - /* Disable PLL. */ - lpc176x_pll_config( 0u ); - - /* Use SYSCLK for CCLK. */ - LPC176X_SCB.cclksel = LPC176X_SCB_CCLKSEL_CCLKDIV( 0u ); - - /* Set the CCLK, PCLK and EMCCLK divider. */ - LPC176X_SCB.cclksel = cclksel_cclkdiv; - - /* Select main oscillator as clock source. */ - LPC176X_SCB.clksrcsel = LPC176X_SCB_CLKSRCSEL_CLKSRC; - - /* The two register writes must be in correct sequence. */ - /* Set PLL configuration. */ - ( LPC176X_SCB.pll_0 ).cfg = pllcfg; - ( LPC176X_SCB.pll_0 ).feed = LPC176X_PLL0CON; - ( LPC176X_SCB.pll_0 ).feed = LPC176X_PLL0CFG; - - /* Enable PLL. */ - lpc176x_pll_config( LPC176X_PLL_CON_PLLE ); - - /* Wait for lock. */ - while ( ( ( LPC176X_SCB.pll_0 ).stat & LPC176X_PLL_STAT_PLOCK ) == 0u ) { - /* Wait */ - } - - /* Connect PLL. */ - lpc176x_pll_config( ( LPC176X_PLL_CON_PLLE | LPC176X_PLL_CON_PLLC ) ); - - /* Wait for connected and enabled. */ - while ( ( ( LPC176X_SCB.pll_0 ).stat & ( LPC176X_PLL_STAT_PLLE | - LPC176X_PLL_STAT_PLLC ) ) == - 0u ) { - /* Wait */ - } - } - - /* else implies that the pll has a wrong value. Also, - there is nothing to do. */ -} - -/** - * @brief Pll initialization. - */ -static BSP_START_TEXT_SECTION void lpc176x_init_pll( void ) -{ -#if ( LPC176X_OSCILLATOR_MAIN == 12000000u ) -#if ( LPC176X_CCLK == 96000000U ) - lpc176x_set_pll( 11u, 0u, 2u ); -#else -#error "unexpected CCLK" -#endif -#else -#error "unexpected main oscillator frequency" -#endif -} - -/** - * @brief Memory map initialization. - */ -static BSP_START_TEXT_SECTION void lpc176x_init_memory_map( void ) -{ - LPC176X_SCB.memmap = LPC176X_SCB_MEMMAP_MAP; -} - -/** - * @brief Memory accelerator initialization. - */ -static BSP_START_TEXT_SECTION void lpc176x_init_memory_accelerator( void ) -{ -#if ( LPC176X_CCLK <= 20000000U ) - LPC176X_SCB.flashcfg = LPC176X_SCB_FLASHCFG_FLASHTIM( 0x0U ); -#elif ( LPC176X_CCLK <= 40000000U ) - LPC176X_SCB.flashcfg = LPC176X_SCB_FLASHCFG_FLASHTIM( 0x1U ); -#elif ( LPC176X_CCLK <= 60000000U ) - LPC176X_SCB.flashcfg = LPC176X_SCB_FLASHCFG_FLASHTIM( 0x2U ); -#elif ( LPC176X_CCLK <= 80000000U ) - LPC176X_SCB.flashcfg = LPC176X_SCB_FLASHCFG_FLASHTIM( 0x3U ); -#elif ( LPC176X_CCLK <= 100000000U ) - LPC176X_SCB.flashcfg = LPC176X_SCB_FLASHCFG_FLASHTIM( 0x4U ); -#else - LPC176X_SCB.flashcfg = LPC176X_SCB_FLASHCFG_FLASHTIM( 0x5U ); -#endif -} - -/** - * @brief Stops the gpdma device. - */ -static BSP_START_TEXT_SECTION void lpc176x_stop_gpdma( void ) -{ -#ifdef LPC176X_STOP_GPDMA - - bool has_power = ( LPC176X_SCB.pconp & LPC176X_SCB_PCONP_GPDMA ) != 0u; - - if ( has_power ) { - GPDMA_CONFIG = 0u; - LPC176X_SCB.pconp &= ~LPC176X_SCB_PCONP_GPDMA; - } - - /* else implies that the current module (gpdma) is turn off. Also, - there is nothing to do. */ - -#endif -} - -/** - * @brief Stops the usb device. - */ -static BSP_START_TEXT_SECTION void lpc176x_stop_usb( void ) -{ -#ifdef LPC176X_STOP_USB - - bool has_power = ( LPC176X_SCB.pconp & LPC176X_SCB_PCONP_USB ) != 0u; - - if ( has_power ) { - OTG_CLK_CTRL = 0u; - - LPC176X_SCB.pconp &= ~LPC176X_SCB_PCONP_USB; - LPC176X_SCB.usbclksel = 0u; - } - - /* else implies that the current module (usb) is turn off. Also, - there is nothing to do. */ -#endif -} - -BSP_START_TEXT_SECTION void bsp_start_hook_0( void ) -{ - lpc176x_init_main_oscillator(); - lpc176x_init_pll(); -} - -BSP_START_TEXT_SECTION void bsp_start_hook_1( void ) -{ - lpc176x_init_memory_map(); - lpc176x_init_memory_accelerator(); - lpc176x_stop_gpdma(); - lpc176x_stop_usb(); - bsp_start_copy_sections(); - bsp_start_clear_bss(); - - /* At this point we can use objects outside the .start section */ -}
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