LPCOpen Platform for LPC18XX/43XX microcontrollers: C:/w/lpcopen_docs/software/lpc_core/lpc_chip/chip_18xx_43xx/eeprom_18xx_43xx.c Source File

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eeprom_18xx_43xx.c
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1 /*
2 * @brief LPC18xx/43xx EEPROM driver
3 *
4 * @note
5 * Copyright(C) NXP Semiconductors, 2012
6 * All rights reserved.
7 *
8 * @par
9 * Software that is described herein is for illustrative purposes only
10 * which provides customers with programming information regarding the
11 * LPC products. This software is supplied "AS IS" without any warranties of
12 * any kind, and NXP Semiconductors and its licensor disclaim any and
13 * all warranties, express or implied, including all implied warranties of
14 * merchantability, fitness for a particular purpose and non-infringement of
15 * intellectual property rights. NXP Semiconductors assumes no responsibility
16 * or liability for the use of the software, conveys no license or rights under any
17 * patent, copyright, mask work right, or any other intellectual property rights in
18 * or to any products. NXP Semiconductors reserves the right to make changes
19 * in the software without notification. NXP Semiconductors also makes no
20 * representation or warranty that such application will be suitable for the
21 * specified use without further testing or modification.
22 *
23 * @par
24 * Permission to use, copy, modify, and distribute this software and its
25 * documentation is hereby granted, under NXP Semiconductors' and its
26 * licensor's relevant copyrights in the software, without fee, provided that it
27 * is used in conjunction with NXP Semiconductors microcontrollers. This
28 * copyright, permission, and disclaimer notice must appear in all copies of
29 * this code.
30 */
31
32 #include "chip.h"
33
34 /*****************************************************************************
35 * Private types/enumerations/variables
36 ****************************************************************************/
37
38 /*****************************************************************************
39 * Public types/enumerations/variables
40 ****************************************************************************/
41
42 /*****************************************************************************
43 * Private functions
44 ****************************************************************************/
45
46 /* Setup EEPROM clock */
47 STATIC void setClkDiv(LPC_EEPROM_T *pEEPROM)
48 {
49 uint32_t clk;
50
51 /* Setup EEPROM timing to 375KHz based on PCLK rate */
52 clk = Chip_Clock_GetRate(CLK_MX_EEPROM);
53
54 /* Set EEPROM clock divide value*/
55 pEEPROM->CLKDIV = clk / EEPROM_CLOCK_DIV - 1;
56 }
57
58 /* Setup EEPROM clock */
59 STATIC INLINE void setWaitState(LPC_EEPROM_T *pEEPROM)
60 {
61 /* Setup EEPROM wait states*/
62 Chip_EEPROM_SetReadWaitState(pEEPROM, EEPROM_READ_WAIT_STATE_VAL);
63 Chip_EEPROM_SetWaitState(pEEPROM, EEPROM_WAIT_STATE_VAL);
64
65 }
66
67 /*****************************************************************************
68 * Public functions
69 ****************************************************************************/
70
71 /* Initializes the EEPROM peripheral with specified parameter */
72 void Chip_EEPROM_Init(LPC_EEPROM_T *pEEPROM)
73 {
74 /* Disable EEPROM power down mode */
75 Chip_EEPROM_DisablePowerDown(pEEPROM);
76 setClkDiv(pEEPROM);
77 setWaitState(pEEPROM);
78 }
79
80 /* Write data from page register to non-volatile memory */
81 void Chip_EEPROM_EraseProgramPage(LPC_EEPROM_T *pEEPROM)
82 {
83 Chip_EEPROM_ClearIntStatus(pEEPROM, EEPROM_CMD_ERASE_PRG_PAGE);
84 Chip_EEPROM_SetCmd(pEEPROM, EEPROM_CMD_ERASE_PRG_PAGE);
85 Chip_EEPROM_WaitForIntStatus(pEEPROM, EEPROM_INT_ENDOFPROG);
86 }
87
88 /* Wait for interrupt */
89 void Chip_EEPROM_WaitForIntStatus(LPC_EEPROM_T *pEEPROM, uint32_t mask)
90 {
91 uint32_t status;
92 while (1) {
93 status = Chip_EEPROM_GetIntStatus(pEEPROM);
94 if ((status & mask) == mask) {
95 break;
96 }
97 }
98 Chip_EEPROM_ClearIntStatus(pEEPROM, mask);
99 }
100