Sz_Insper
gerador senoidal com look-up table 8 bit
Dependencies: mbed SeeedShieldBot BluetoothSerial
Revision 0:66bb2be784c0, committed 2021-06-07
- Comitter:
- afm76
- Date:
- Mon Jun 07 16:27:58 2021 +0000
- Commit message:
- Gerador senoidal com Look-up table
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/BluetoothSerial.lib Mon Jun 07 16:27:58 2021 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/yihui/code/BluetoothSerial/#f56002898ee8
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/SeeedShieldBot.lib Mon Jun 07 16:27:58 2021 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/teams/components/code/SeeedShieldBot/#9fd1722259a1
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Mon Jun 07 16:27:58 2021 +0000
@@ -0,0 +1,152 @@
+//--------------------------------------------------------------------------
+// 2021-06
+// Esse programa gera uma senoide com um conversor R2R e uma tabela de senos
+// a tabela foi construida no Excel para 90 passos de 1 grau, assim o valor
+// dos senos de 0 a 90 graus sera rebatido para 90 a 180, bem como 180 a 270
+// e 270 a 360 graus
+// -------------------------------------------------------------------------
+
+#include "mbed.h"
+
+float sinus[]{
+0,
+0.017452406,
+0.034899497,
+0.052335956,
+0.069756474,
+0.087155743,
+0.104528463,
+0.121869343,
+0.139173101,
+0.156434465,
+0.173648178,
+0.190808995,
+0.207911691,
+0.224951054,
+0.241921896,
+0.258819045,
+0.275637356,
+0.292371705,
+0.309016994,
+0.325568154,
+0.342020143,
+0.35836795,
+0.374606593,
+0.390731128,
+0.406736643,
+0.422618262,
+0.438371147,
+0.4539905,
+0.469471563,
+0.48480962,
+0.5,
+0.515038075,
+0.529919264,
+0.544639035,
+0.559192903,
+0.573576436,
+0.587785252,
+0.601815023,
+0.615661475,
+0.629320391,
+0.64278761,
+0.656059029,
+0.669130606,
+0.68199836,
+0.69465837,
+0.707106781,
+0.7193398,
+0.731353702,
+0.743144825,
+0.75470958,
+0.766044443,
+0.777145961,
+0.788010754,
+0.79863551,
+0.809016994,
+0.819152044,
+0.829037573,
+0.838670568,
+0.848048096,
+0.857167301,
+0.866025404,
+0.874619707,
+0.882947593,
+0.891006524,
+0.898794046,
+0.906307787,
+0.913545458,
+0.920504853,
+0.927183855,
+0.933580426,
+0.939692621,
+0.945518576,
+0.951056516,
+0.956304756,
+0.961261696,
+0.965925826,
+0.970295726,
+0.974370065,
+0.978147601,
+0.981627183,
+0.984807753,
+0.987688341,
+0.990268069,
+0.992546152,
+0.994521895,
+0.996194698,
+0.99756405,
+0.998629535,
+0.999390827,
+0.999847695,
+1,
+};
+
+float VCC,t,T,tos;
+int f,freq; //, T;
+BusOut saida(D4, D5, D6, D7, D8, D9, D10, D11);
+
+int main()
+{
+ VCC = 3.3; //used for determing offset voltage
+ freq = 60; //freq. in Hz
+ tos = 15.5; //time off-set in us (5.6ms / 350 = 15.5us)
+ t = 30;
+ T = t - tos; //T = 30; //(1/freq)/360; //time slice in seconds for the sinusoid routine
+
+ while (true)
+ {
+ for (int i=0; i < 90; i++) //0 to 90 degree
+ {
+ f=74*((sinus[i]*VCC/2)+VCC/2)+10; //59 and 60 are adj for 1/4 of the FFh range(8bit) according to Vref
+ saida = f;
+// printf("%1.3f", j);
+ wait_us(T);//wait(T);
+ }
+
+ for (int i=90; i > 0; i--) //90 to 180 degree
+ {
+ f=74*((sinus[i]*VCC/2)+VCC/2)+10;
+ saida = f;
+// printf("%1.3f", j);
+ wait_us(T);//wait(T);
+ }
+
+ for (int i=0; i < 90; i++) //180 to 270 degree
+ {
+ f=74*((-sinus[i]*VCC/2)+VCC/2)+10;
+ saida = f;
+// printf("%1.3f", j);
+ wait_us(T);//wait(T);
+ }
+
+ for (int i=90; i > 0; i--) //270 to 360 degree
+ {
+ f=74*((-sinus[i]*VCC/2)+VCC/2)+10;
+ saida = f;
+// printf("%1.3f", j);
+ wait_us(T);//wait(T);
+ }
+
+ }
+}
\ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Mon Jun 07 16:27:58 2021 +0000 @@ -0,0 +1,1 @@ +https://os.mbed.com/users/mbed_official/code/mbed/builds/65be27845400 \ No newline at end of file