📄 bsp.c
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case 1:
Fin = MAIN_OSC_FRQ;
break;
case 2:
Fin = RTC_OSC_FRQ;
break;
default:
Fin = IRC_OSC_FRQ;
break;
}
if ((PLLSTAT & (1 << 25)) > 0) { /* If the PLL is currently enabled and connected */
msel = (CPU_INT32U)(PLLSTAT & 0x3FFF) + 1; /* Obtain the PLL multiplier */
nsel = (CPU_INT32U)((PLLSTAT >> 16) & 0x0F) + 1; /* Obtain the PLL divider */
pllClkFrq = (2 * msel * Fin / nsel); /* Compute the PLL output frequency */
} else {
pllClkFrq = (Fin); /* The PLL is bypassed */
}
cClkDiv = (CPU_INT08U)(CCLKCFG & 0x0F) + 1; /* Obtain the CPU core clock divider */
cClkFrq = (CPU_INT32U)(pllClkFrq / cClkDiv); /* Compute the ARM Core clock frequency */
return (cClkFrq);
}
/*
*********************************************************************************************************
* INITIALIZE I/Os
*
* Description : This function initializes the GPIO pins. All the I/O pins are initialized in this function
* so you don't have to look at multiple places for I/O initialization.
*
* Arguments : none
*
* Note(s) : 1) Refer to the LPC2378 User Manaul, Chapter 9 for a detailed Pin Assignment
* 2) The UARTS are connected as follows
* PO.2 UART0 Tx
* PO.3 UART0 Rx
* PO.15 UART1 Tx
* PO.16 UART1 Rx
*
* 3) The 2x16 LCD is connected as follows
*
* P1.24 D4 LCD Data 4 \
* P1.25 D5 LCD Data 5 |
* P1.26 D6 LCD Data 6 | 4-bit interface mode
* P1.27 D7 LCD Data 7 /
* P1.28 RS Register Select
* P1.29 R/W Read (H) / Write (L)
* P1.30 E Enable
*
* 3) The onboard LEDs are connected as follows
* P2[7:0] GPIO Port 2 Pins 7:0
*
* 4) The push button is connected as follows
* P2.10 GPIO Port 2.10
*********************************************************************************************************
*/
static void BSP_IO_Init (void)
{
CPU_INT32U value;
#if (OS_VIEW_MODULE > 0) && (OS_VIEW_COMM_SEL == OS_VIEW_UART_0)
PINSEL0 &= ~(0x0F << 4); /* Clear the UART0 Function bits */
PINSEL0 |= (0x01 << 4); /* Configure P0.2 for use with UART0 TxD */
PINSEL0 |= (0x01 << 6); /* Configure P0.3 for use with UART0 RxD */
#endif
#if (OS_VIEW_MODULE > 0) && (OS_VIEW_COMM_SEL == OS_VIEW_UART_1)
PINSEL0 &= ~(0x03 << 30); /* Clear the UART1 Tx function bits */
PINSEL1 &= ~(0x03 << 0); /* Clear the UART1 Rx function bits */
PINSEL0 |= (0x01 << 30); /* Configure P0.30 for use with UART1 TxD */
PINSEL1 |= (0x01 << 0); /* Configure P1.0 for use with UART1 RxD */
#endif
#ifdef DISP_MODULE_PRESENT
value = (3 << 24) | (3 << 26) | (3 << 28); /* Create a mask for the LCD Control function bits */
PINSEL3 &= ~value; /* Clear and configure the associated function bits as GPIO */
value = (3 << 16) | (3 << 18) | (3 << 20) | (3 << 22); /* Create a mask for the LCD Data function bits */
PINSEL3 &= ~value; /* Clear and configure the associated function bits as GPIO */
value = LCD_BIT_DATA3 | LCD_BIT_DATA2 | LCD_BIT_DATA1 | LCD_BIT_DATA0 | LCD_BIT_E | LCD_BIT_RS | LCD_BIT_RW;
IO1DIR |= value; /* Configure all of the LCD pins as outputs */
DispRW_High(); /* Initialize the state of the LCD RW bit to High */
#endif
PINSEL2 &= ~(0xFF << 0); /* Clear P2[7:0] function bits enabling GPIO for the LEDs */
FIO20DIR |= (0xFF << 0); /* Configure P2[7:0] as output bits */
PINSEL2 &= ~(0x03 << 30); /* Clear P2.10 function bits, enabling GPIO function */
FIO20DIR &= ~(0x01 << 10); /* Configure P2.10 as an input bit */
PINSEL10 = 0; /* Release ETM control of PORT 2 I/O pins */
PINSEL1 = ~(0x03 << 20); /* Select Port 0, pin 26 as GPIO (speaker pin) */
IO0CLR = (0x01 << 26); /* Clear pin 26, prevent speaker usage humming */
}
/*$PAGE*/
/*
*********************************************************************************************************
* WRITE DATA TO DISPLAY DEVICE
*
* Description : This function sends a single BYTE to the display device.
* Arguments : 'data' is the BYTE to send to the display device
* Returns : none
* Notes : 1) The Keil LPC2378 evaluation board uses a 4 bit interface.
* If an 8 bit interface is used. BSP_IO_Init() and DispDataWr() will need
* to be modified to reflect the new databus. In 8 bit mode, DispDataWrOneNibble()
* is not necessary.
*********************************************************************************************************
*/
#ifdef DISP_MODULE_PRESENT
void DispDataWr (CPU_INT08U data)
{
CPU_INT32U value;
DispRW_Low(); /* Set R/W write LOW to write to the LCD module */
DispE_High(); /* Write the UPPER nibble to the LCD module */
value = ((data >> 4) & 0x0F) << 24;
IO1SET = value;
value = (~(data >> 4) & 0x0F) << 24;
IO1CLR = value;
DispDly_uS(100);
DispE_Low();
DispDly_uS(100); /* Write the LOWER nibble to the LCD module */
DispE_High();
value = (data & 0x0F) << 24;
IO1SET = value;
value = (~data & 0x0F) << 24;
IO1CLR = value;
DispDly_uS(100);
DispE_Low();
}
#if DISP_BUS_WIDTH == 4
void DispDataWrOneNibble(CPU_INT08U data)
{
CPU_INT32U value;
DispRW_Low(); /* Set R/W write LOW to write to the LCD module */
DispE_High(); /* Write the UPPER nibble to the LCD module */
value = ((data >> 4) & 0x0F) << 24;
IO1SET = value;
value = (~(data >> 4) & 0x0F) << 24;
IO1CLR = value;
DispDly_uS(100);
DispE_Low();
}
#endif
#endif /* End #ifdef DISP_MODULE_PRESENT */
/*
*********************************************************************************************************
* DELAY
*
* Description : This function is called to delay for the specified number of microseconds.
*
* Arguments : us Number of microseconds
*
* Returns : none
*********************************************************************************************************
*/
#ifdef DISP_MODULE_PRESENT
void DispDly_uS (CPU_INT32U us)
{
CPU_INT32U us_per_tick;
CPU_INT32U ticks;
us_per_tick = 1000000L / OS_TICKS_PER_SEC;
ticks = us / us_per_tick + 1;
OSTimeDly(ticks);
}
#endif
/*
*********************************************************************************************************
* INITIALIZE DISPLAY DRIVER I/O PORTS
*
* Description : This initializes the I/O ports used by the display driver.
*
* Arguments : none
*
* Returns : none
*
* Note(s) : 1) The I/Os for the LCD module are initialized in BSP_IO_Init().
*********************************************************************************************************
*/
#ifdef DISP_MODULE_PRESENT
void DispInitPort (void)
{
}
#endif
/*
*********************************************************************************************************
* SELECT COMMAND OR DATA REGISTER
*
* Description : This changes the Register Select control line to the LCD controller.
* Arguments : none
*********************************************************************************************************
*/
#ifdef DISP_MODULE_PRESENT
void DispSel (CPU_INT08U sel)
{
if (sel == DISP_SEL_CMD_REG) {
IO1CLR = LCD_BIT_RS; /* Select the command register (RS low) */
} else {
IO1SET = LCD_BIT_RS; /* Select the data register (RS high) */
}
}
#endif
/*
*********************************************************************************************************
* DISPLAY CONTROL LINE FUNCTIONS
*********************************************************************************************************
*/
#ifdef DISP_MODULE_PRESENT
static void DispE_High (void)
{
IO1SET = LCD_BIT_E; /* Raise the LCD Enable pin high */
}
static void DispE_Low (void)
{
IO1CLR = LCD_BIT_E; /* Lower the LCD Enable pin */
}
static void DispRW_High (void)
{
IO1SET = LCD_BIT_RW; /* Raise the LCD R/W pin */
}
static void DispRW_Low (void)
{
IO1CLR = LCD_BIT_RW; /* Lower the LCD R/W pin */
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