/**
* init_module() - This function is called when the module is loaded
*
* Return: On succes the function retuns a 0 (SUCCES). Otherwise a
* negative number is returned.
*/
int init_module(void)
{
Major = register_chrdev(0, DEVICE_NAME, &fops);
if (Major < 0)
{
printk(KERN_ALERT "Registering char device failed with %d\n", Major);
return Major;
}
printk(KERN_INFO "I was assigned major number %d. To talk to\n", Major);
printk(KERN_INFO "the driver, create a device file with\n");
printk(KERN_INFO "'mknod /dev/%s c %d 0'.\n", DEVICE_NAME, Major);
printk(KERN_INFO "Try various minor numbers. Try to echo to\n");
printk(KERN_INFO "the device file.\n");
printk(KERN_INFO "Remove the device file and module when done.\n");
gpio = (volatile unsigned int *)ioremap(GPIO_BASE, 1024);
pwm = (volatile unsigned int *)ioremap(PWM_BASE, 1024);
clk = (volatile unsigned int *)ioremap(CLOCK_BASE, 1024);
// Set pin directions for the output
INP_GPIO(GPIO_OUTP);
OUT_GPIO(GPIO_OUTP);
// PWM and clock settings
SET_GPIO_ALT(GPIO_PWM1, GPIO_ALT);
// stop clock and waiting for busy flag doesn't work, so kill clock
*(clk + CLK_CTL) = CLK_PASSWD | CLK_CTL_KILL;
udelay(10);
// Set clock divider
*(clk + CLK_DIV) = CLK_PASSWD | CLK_DIV_DIVI(96);
// source=osc and enable clock
*(clk + CLK_CTL) = CLK_PASSWD | CLK_CTL_ENAB | CLK_CTL_SRC(CLK_CTL_SRC_OSC);
// disable PWM and start with a clean register
*(pwm + PWM_CTL) = 0;
// needs some time until the PWM module gets disabled, without the delay the PWM module crashes
udelay(10);
// Set the PWM range
*(pwm + PWM_RNG2) = 4000;
// Initialize with a 50% dutycycle
setServo(50);
// start PWM in M/S transmission mode
*(pwm + PWM_CTL) = PWM_CTL_MSEN2 | PWM_CTL_PWEN2;
interrupt_config();
return SUCCESS;
}
void main()
{
unsigned char j;
TRISD=0xFE; //RD0 is output
HLVDCON=0x1C; //config HLVD module
while(IRVST==0); //wait until internal reference is stable
interrupt_config(); //configure HLVD interrupt
RD0=0; //trip indicator
while(1)
{
asm("SLEEP"); //go into sleep mode
}
}
void main()
{
TRISA=0x0F; //configure RA0-RA3 as input & RA4-RA5 as output
TRISD=0xFC; //RD0-RD1 is output
//configure RA0-RA3 as analog inputs
PCFG0=1;
PCFG1=1;
PCFG2=0;
PCFG3=1;
//configure comparator
CM0=1;
CM1=0;
CM2=0;
interrupt_config(); //configure comparator interrupt
RD1=0;
while(1)
{
//toggle RD0 every 1s
RD0=1;
delay(1000);
RD0=0;
delay(1000);
}
}