BeRTOS
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00001 00060 #include "hw/pwm_map.h" // For PwmDev and channel avaible on thi target 00061 #include "cfg/cfg_pwm.h" 00062 #include <cfg/macros.h> 00063 #include <cfg/debug.h> 00064 00065 // Define logging setting (for cfg/log.h module). 00066 #define LOG_LEVEL PWM_LOG_LEVEL 00067 #define LOG_FORMAT PWM_LOG_FORMAT 00068 #include <cfg/log.h> // for logging system 00069 00070 #include <cpu/types.h> 00071 #include <cpu/irq.h> 00072 00073 #include <drv/pwm.h> 00074 #include CPU_HEADER(pwm) 00075 00076 #define DELAY_TIME 10000 // This is a number of for cycle before to set a new value of duty 00077 #define PWM_DUTY_INC 200 // Incremental value for duty 00078 00079 00080 /* 00081 * Simple struct to store 00082 * the testing value. 00083 */ 00084 typedef struct PwmTest 00085 { 00086 int ch; 00087 bool pol; 00088 pwm_freq_t freq; 00089 pwm_duty_t duty; 00090 } PwmTest; 00091 00092 /* 00093 * Test settings for each channel. 00094 * 00095 * Frequency value is in Hz. 00096 * 00097 * Esample of value for duty cycle" 00098 * 00099 * - 100% => 0xFFFFFFFF 00100 * - 80% => 0xCCCCCCCC 00101 * - 75% => 0xBFFFFFFF 00102 * - 50% => 0x7FFFFFFF 00103 * - 25% => 0x3FFFFFFF 00104 * - 33% => 0x55555555 00105 * - 16% => 0x2AAAAAAA 00106 */ 00107 static PwmTest pwm_test_cfg[PWM_CNT] = 00108 { 00109 /* Channel, polarity, frequecy, duty */ 00110 { 0, false, 100UL, 0 }, /* 100Hz, 0% duty */ 00111 { 1, false, 1000UL, 0x7FFF }, /* 1KHz, 50% duty */ 00112 { 2, false, 12356UL, 0x5555 }, /* 12,356KHz, 33% duty */ 00113 { 3, false, 100000UL, 0xCCCC } /* 100KHz, 80% duty */ 00114 }; 00115 00116 /* 00117 * Setup all needed to test PWM on AT91 00118 * 00119 */ 00120 int pwm_testSetup(void) 00121 { 00122 LOG_INFO("Init pwm.."); 00123 pwm_init(); 00124 LOG_INFO("done.\n"); 00125 00126 return 0; 00127 } 00128 00129 00130 /* 00131 * Test suit for genation of pwm waveform. 00132 * 00133 */ 00134 void NORETURN pwm_testRun(void) 00135 { 00136 pwm_duty_t duty = 0; 00137 int delay = 0; 00138 00139 pwm_testSetup(); 00140 00141 LOG_INFO("\n\n===== BeRTOS PWM test =====\n\n"); 00142 00143 for (int i = 0; i < PWM_CNT; i++) 00144 { 00145 LOG_INFO("PWM test ch[%d]\n", pwm_test_cfg[i].ch); 00146 LOG_INFO("--> set pol[%d]", pwm_test_cfg[i].pol); 00147 LOG_INFO("\n(Note: if polarity is false the output waveform start at high level,\n see low level implentation for detail)i\n"); 00148 pwm_setPolarity(pwm_test_cfg[i].ch, pwm_test_cfg[i].pol); 00149 LOG_INFO("..ok\n"); 00150 00151 LOG_INFO("--> set freq[%ld]", pwm_test_cfg[i].freq); 00152 pwm_setFrequency(pwm_test_cfg[i].ch, pwm_test_cfg[i].freq); 00153 LOG_INFO("..ok\n"); 00154 00155 LOG_INFO("--> set duty[%d]", pwm_test_cfg[i].duty); 00156 pwm_setDuty(pwm_test_cfg[i].ch, pwm_test_cfg[i].duty); 00157 LOG_INFO("..ok\n"); 00158 00159 LOG_INFO("--> Enable pwm"); 00160 pwm_enable(pwm_test_cfg[i].ch, true); 00161 LOG_INFO("..ok\n"); 00162 } 00163 00164 LOG_INFO("\n-------------------------- Dinamic PWM test --------------------------\n"); 00165 LOG_INFO("We test if driver change correctly the duty cycle durind it working.\n"); 00166 LOG_INFO("On your oscilloscope you should see the pwm singal that increase until\n"); 00167 LOG_INFO("the duty value is 100%%. After this value we invert a polarity of pwm,\n"); 00168 LOG_INFO("and repeat the test. But now you should see that pwm duty decreasing until\n"); 00169 LOG_INFO("0%% duty value.\nAfter that, we repeat the test from beginning.\n\n"); 00170 00171 for (;;) 00172 { 00173 if (delay == DELAY_TIME) 00174 { 00175 for (int i = 0; i < PWM_CNT; i++) 00176 { 00177 LOG_INFO("PWM test ch[%d]\n", pwm_test_cfg[i].ch); 00178 LOG_INFO("--> set duty[%d]", duty); 00179 pwm_setDuty(pwm_test_cfg[i].ch, duty); 00180 LOG_INFO("..ok\n"); 00181 } 00182 LOG_INFO("\n++++++++++++++++++++\n"); 00183 duty += PWM_DUTY_INC; 00184 delay = 0; 00185 } 00186 00187 //Reset duty cycle overflow 00188 if (duty >= (pwm_duty_t)0xFFFF) 00189 { 00190 duty = 0; 00191 for (int i = 0; i < PWM_CNT; i++) 00192 { 00193 LOG_INFO("Duty reset, swap polarity:\n"); 00194 LOG_INFO("--> pol from [%d] to [%d]", pwm_test_cfg[i].pol, !pwm_test_cfg[i].pol); 00195 00196 pwm_test_cfg[i].pol = !pwm_test_cfg[i].pol; 00197 pwm_setPolarity(pwm_test_cfg[i].ch, pwm_test_cfg[i].pol); 00198 00199 LOG_INFO("..ok\n"); 00200 } 00201 LOG_INFO("\n++++++++++++++++++++\n"); 00202 } 00203 delay++; 00204 } 00205 } 00206 00207 /* 00208 * End a PWM Test. 00209 * (Unused) 00210 */ 00211 int pwm_testTearDown(void) 00212 { 00213 /* */ 00214 return 0; 00215 } 00216 00217 /* 00218 * Empty main. 00219 * 00220 * Look it as exmple or use it if 00221 * you want test a PWM driver stand alone. 00222 */ 00223 #if 0 00224 int main(void) 00225 { 00226 IRQ_ENABLE; 00227 kdbg_init(); 00228 00229 pwm_testRun(); 00230 00231 for(;;) 00232 { 00233 } 00234 00235 } 00236 #endif 00237 00238