diff options
Diffstat (limited to 'c/src/lib/libbsp/arm/lpc32xx/misc/system-clocks.c')
-rw-r--r-- | c/src/lib/libbsp/arm/lpc32xx/misc/system-clocks.c | 140 |
1 files changed, 0 insertions, 140 deletions
diff --git a/c/src/lib/libbsp/arm/lpc32xx/misc/system-clocks.c b/c/src/lib/libbsp/arm/lpc32xx/misc/system-clocks.c deleted file mode 100644 index e5e3f00dd4..0000000000 --- a/c/src/lib/libbsp/arm/lpc32xx/misc/system-clocks.c +++ /dev/null @@ -1,140 +0,0 @@ -/** - * @file - * - * @ingroup arm_lpc32xx - * - * @brief System clocks. - */ - -/* - * Copyright (c) 2011 embedded brains GmbH. All rights reserved. - * - * embedded brains GmbH - * Obere Lagerstr. 30 - * 82178 Puchheim - * Germany - * <rtems@embedded-brains.de> - * - * 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/lpc32xx.h> - -uint32_t lpc32xx_sysclk(void) -{ - uint32_t sysclk_ctrl = LPC32XX_SYSCLK_CTRL; - - return (sysclk_ctrl & 0x1) == 0 ? - LPC32XX_OSCILLATOR_MAIN - : (397 * LPC32XX_OSCILLATOR_RTC); -} - -uint32_t lpc32xx_hclkpll_clk(void) -{ - uint32_t sysclk = lpc32xx_sysclk(); - uint32_t hclkpll_ctrl = LPC32XX_HCLKPLL_CTRL; - uint32_t m = HCLK_PLL_M_GET(hclkpll_ctrl) + 1; - uint32_t n = HCLK_PLL_N_GET(hclkpll_ctrl) + 1; - uint32_t p = 1U << HCLK_PLL_P_GET(hclkpll_ctrl); - uint32_t hclkpll_clk = 0; - - if ((hclkpll_ctrl & HCLK_PLL_BYPASS) != 0) { - if ((hclkpll_ctrl & HCLK_PLL_DIRECT) != 0) { - hclkpll_clk = sysclk; - } else { - hclkpll_clk = sysclk / (2 * p); - } - } else { - if ((hclkpll_ctrl & HCLK_PLL_DIRECT) != 0) { - hclkpll_clk = (m * sysclk) / n; - } else { - if ((hclkpll_ctrl & HCLK_PLL_FBD_FCLKOUT) != 0) { - hclkpll_clk = m * (sysclk / n); - } else { - hclkpll_clk = (m / (2 * p)) * (sysclk / n); - } - } - } - - return hclkpll_clk; -} - -uint32_t lpc32xx_periph_clk(void) -{ - uint32_t pwr_ctrl = LPC32XX_PWR_CTRL; - uint32_t periph_clk = 0; - - if ((pwr_ctrl & PWR_NORMAL_RUN_MODE) != 0) { - uint32_t hclkdiv_ctrl = LPC32XX_HCLKDIV_CTRL; - uint32_t div = HCLK_DIV_PERIPH_CLK_GET(hclkdiv_ctrl) + 1; - - periph_clk = lpc32xx_hclkpll_clk() / div; - } else { - periph_clk = lpc32xx_sysclk(); - } - - return periph_clk; -} - -uint32_t lpc32xx_hclk(void) -{ - uint32_t pwr_ctrl = LPC32XX_PWR_CTRL; - uint32_t hclk = 0; - - if ((pwr_ctrl & PWR_HCLK_USES_PERIPH_CLK) != 0) { - hclk = lpc32xx_periph_clk(); - } else { - if ((pwr_ctrl & PWR_NORMAL_RUN_MODE) != 0) { - uint32_t hclkdiv_ctrl = LPC32XX_HCLKDIV_CTRL; - uint32_t div = 1U << HCLK_DIV_HCLK_GET(hclkdiv_ctrl); - - hclk = lpc32xx_hclkpll_clk() / div; - } else { - hclk = lpc32xx_sysclk(); - } - } - - return hclk; -} - -uint32_t lpc32xx_arm_clk(void) -{ - uint32_t pwr_ctrl = LPC32XX_PWR_CTRL; - uint32_t arm_clk = 0; - - if ((pwr_ctrl & PWR_HCLK_USES_PERIPH_CLK) != 0) { - arm_clk = lpc32xx_periph_clk(); - } else { - if ((pwr_ctrl & PWR_NORMAL_RUN_MODE) != 0) { - arm_clk = lpc32xx_hclkpll_clk(); - } else { - arm_clk = lpc32xx_sysclk(); - } - } - - return arm_clk; -} - -uint32_t lpc32xx_ddram_clk(void) -{ - uint32_t hclkdiv_ctrl = LPC32XX_HCLKDIV_CTRL; - uint32_t div = HCLK_DIV_DDRAM_CLK_GET(hclkdiv_ctrl); - uint32_t ddram_clk = 0; - - if (div != 0) { - uint32_t pwr_ctrl = LPC32XX_PWR_CTRL; - - if ((pwr_ctrl & PWR_NORMAL_RUN_MODE) != 0) { - ddram_clk = lpc32xx_hclkpll_clk(); - } else { - ddram_clk = lpc32xx_sysclk(); - } - - ddram_clk /= div; - } - - return ddram_clk; -} |